Dog-Dog Fruit Model:Cerberus
Cat-Cat Fruit Model:Byakko
Bird-Bird Fruit Model:Thunderbird
Snake-Snake Fruit Model:Jormungandr
Ox-Ox Fruit Model:Minotaur
Horse-Horse Fruit Model:Unicorn
Bug-Bug Fruit Model:Mothman
Dog-Dog Fruit Model:Cerberus
Cat-Cat Fruit Model:Byakko
Bird-Bird Fruit Model:Thunderbird
Snake-Snake Fruit Model:Jormungandr
Ox-Ox Fruit Model:Minotaur
Horse-Horse Fruit Model:Unicorn
Bug-Bug Fruit Model:Mothman
Here goes my first attempt...
Tosei, also known by his alias, Gōrudokami is an Admiral of the Marines. He is well known for his coldblooded methods of hunting down pirates and those who dare to turn their back against the Marines.
Tosei was also known to be the longtime rival and sworn enemy of infamous pirate captain Lovecraft D. Murdok who mysteriously disappeared but would stop at nothing to track him and his crew down.
Appearance
Tosei has a towering intimidating appearance that many would often keep away from. He has a large scar on his left eye that he received twenty-five years ago, he has heterochromia where his left eye is icy blue and his right eye is muted green, pale skin and long platinum blonde hair that reaches past his shoulders.
Like other admirals, Tosei sports the standard marine coat with his personal clothes underneath, wearing the coat on his shoulders like a cape with his arms not in the sleeves. His sleeves cuffs are gold. Tosei wears an open gold and black vest dress top, gold pants and black boots to go along with his outfit but for his hands, he opts out for black gloves.
Personality
Tosei, overall, has a no nonsense personality and does not take fondly to laziness or foolishness. Tosei often speaks in an intimidating yet calm tone(which still sends chills to many people who converse with him except those who do not fear him). It has become a running gag where people will get a cold chill whenever Tosei would speak to them or would appear behind them. At times, Tosei deep down, doesn't understand why he's seen as intimidating to others and even if he tries not to be, it's a force of habit of his.
Tosei mainly keeps a calm attitude but is known to be extremely short-tempered. Anyone who dares to anger Tosei whether it be for the slightest thing he would not hesitate to kill without mercy or would growl at them as a warning. This was even displayed when he joined the Marines his frightening look on his face showed he was up for any challenge that he wasn't afraid to face. Because of his stern and intimidating personality, Tosei hardly shows any emotion nor does he ever smile. However, there are some moments he does smile but it is a huge rarity.
Another part of Tosei's personality is his perfectionism. He likes to make sure an objective is completed down to the slightest detail with no errors or delays even. He hates making any type of mistakes and makes sure everything is done the way he believes should be done(he strongly believe in the idea of, "it's my way or the highway" attitude). There will be times where Tosei would often patrol the areas of Marineford in his full-beast form to keep an eye out for any intruders or to make sure no one slacks off on their assignments. Tosei strongly believes that the only way one can get the task done is through hard work even if it kills them. Tosei firmly believes in his own motto, "Faultless Justice" (完璧な正義, Kanpekina Seigi), as he feels Justice must be carried out without any flaws, no mistakes and with the utmost proficiency.
When battling, Tosei is known to be ruthless, cold, highly observant and merciless. This often extends into how he fights as well. Thanks to his Devil Fruit powers, Tosei often ends the battle as swiftly as he can. Tosei does respect pirates who dare to challenge him and at times would mess with his opponent with words that would set them off to weaken them mentally. As he continues his manipulation tactics, he would do it in a way to force his opponent to surrender, die by his own talons or to end their own lives right in front of him. He does believe in battling honorably, and would not back down unless either him or whomever he is fighting falls in defeat. Overall, Tosei would not hesitate ending the battle by slaughtering his opponents with his own talons.
Tosei has a strong hatred for pirates and would often say that people who become pirates don't understand what it truly means to fight for what's right and wrong. This disdain, of course, was stemmed from when he was a child after his parents and the civilians in his hometown in the North Blue were slaughtered by pirates before his eyes and his former best friend abandoned him. Even the Warlords who ally with the World Government, Tosei has a strong distrust in them believing despite them allying with the World Government, if he'd wanted to, if they stepped out of line, he'd slaughter every single one of them without hesitation.
Despite their connections with the World Nobles, Tosei does have a lighter side(surprisingly) where he does at times silently display disgust towards the behavior of the World Nobles(though he mainly keeps it to himself out of respect). Though the existence of the World Nobles are vital for the World Government, Tosei still doesn't trust them as much but would still follow along with their plans and assist them from time to time. Even if someone were to bad mouth about the World Nobles, Tosei wouldn't bother slaughtering them but instead brushes it off since he wants nothing to do with them.
When not on the line of duty, Tosei's activities often involve training to enhance his fighting skills and will often lift weights while in both human and his hybrid form. He also has a love of reading any type of book or document he could get his hands on and study it for hours on end. Though Tosei is a very strict and stern person, he would, at times, praise hard work from others when training new subordinates and is highly patient with their development(again, highly rare). Tosei's night activities include reading and hunting for prey in his full-beast form.
Relationships
Enemies:
Lovecraft D. Murdok
Lovecraft D. Murdok was once Tosei's lifelong best friend before the massacre in the North Blue. Since then, him and Murdok got into many arguments over their own personal views(stealing, robbing, etc) causing their friendship to shatter. Due to this, Tosei sees Murdok as his sworn enemy for nearly twenty-two years since the two went their separate ways. Murdok becoming a pirate, while Tosei went down the path of becoming a Marine. The two would often clash with one other for the next decade until Murdok mysteriously disappeared. Since Murdok's disappearance, Tosei made it his personal goal to hunt down Murdok and kill him with his own two hands.
Rain Pirates
Tosei has some hatred for the Rain Pirates for their notoriety, mainly for their captain Ame. Though, he may be unaware that she is Murdok's daughter and strikes curiosity about her.
Powers and Abilities
Physical abilities
Even without using his Devil Fruit powers, Tosei is a powerhouse individual. Despite being a human, he has enhanced agility and immeasurable strength being able to crush boulders with kicks and punches. Tosei is also skilled in the Rokushiki, mainly Shigan and Soru. Soru allows him to move so fast it makes it seem like he is appearing in more places at once even in his either his human, hybrid or full-beast form. With Shigan, combined with Busoshoku Haki, it allows him to pushes his finger into a certain target at a very high speed, leaving a wound similar to a bullet wound(this being highly useful when battling someone with a Logia devil fruit). Tosei is also shown to have strong will being able to resist Conquer's Haki users.
Unmeasured Stealth
Tosei is shown to have stealth that is unmeasured by most people. Thanks to the use of his Devil Fruit powers, Tosei is to hunt down any of his prey who would be in hiding without being detected either in his human, hybrid or full-beast form. This was shown as early in his rookie days when he was able to hunt down a pirate crew that were invading an island and capturing them without the urge to kill them(despite wanting to).
High Durability
Because of his perfectionist nature and training, Tosei is able to withstand any hit or damage that an average human would not be able to withstand. He also shows to have a high pain tolerance level when fighting as being able to fight it off. and take a lot of hits though he would rather end a battle quickly. This usually involves fighting against a tough army of pirates or trying to solve a problem that involves an entire island. One of Tosei's best feats of durability was being able to go out of his way to save a village from a pirate invasion while heavily wounded and looked on the verge of death.
Devil Fruit
Tosei ate the Tori Tori no Mi, Model: Thunderbird, a Mythical Zoan-class Devil Fruit that allows him to transform into a thunderbird hybrid and a full thunderbird at will. This Devil Fruit is very powerful and Tosei mainly uses his powers either for travel or to swiftly attack his foes using his talons or lightning based attacks striking down his opponents. It should be noted that even if someone got swiped by Tosei's talons, they would be knocked unconscious from volts for a long period of time or kill them instantly depending on his strength he applies onto his talons when fighting. Due to his immeasurable strength, when fighting his battle would usually end instantly due to how much force he applies into his attacks if either in his beast-form or his human-beast form. An example being shown after saving a village from a pirate invasion, in his full-beast form, he electrocuted an entire pirate crew in cold blood giving him the nickname, "The Blood Thunderbird".
Haki
Tosei possesses both Busoshoku Haki and Kenbunshoku Haki. Tosei actually had Kenbunshoku Haki since he was a child but was unaware of it until he was older after he consumed his devil fruit when he was seventeen. At first, he was dismissive over this but as he got older, he began to train and hone his skills in Kenbunshoku Haki by the time he entered the Marines. Later in his life, when Tosei was Captain, this was used when he knew a village was in danger due to a sudden pirate raid. Tosei was able to pick up on their presence and knew how close they were to where he was able to slaughter them one by one without being detected. Much later during his training, Tosei finally came to the realization that he does have Kenbunshoku Haki. Tosei mainly uses Kenbunshoku Haki to pick up on presence of other people as well as any sneak attacks.
During his more extensive training with the Vice Admirals, Tosei was able to use Busoshoku Haki. Naturally, Tosei uses this to increase his attack power against Logia users. Tosei can harden up not only his arms and legs but his talons allowing for a more effective tool during combat. Tosei can also harden his entire body with Busoshoku Haki and combines it with Shigan allowing his attacks to hit with more damage. Tosei is also able to use the advanced form of Busoshoku Haki allowing him to attack others without making direct contact in either his human form or hybrid form.
History
Before Joining The Marines
Tosei was born as the only son into a loving family in the North Blue. His mother was a well-respected physician while his father was a Vice Admiral. During most of his childhood, Tosei lived a happy and peaceful life and grew up with his childhood friend Murdok. Together, the two would often spar with one another, go on various adventures and even talked about their dreams that they wanted to accomplish when they got older. Murdok was undecided while Tosei wanted to be a Marine like his father.
When Tosei turned ten, his hometown was invaded by pirates, all the civilians in the town were slaughtered and his hometown burned to the ground, including Murdok and Tosei's homes and their families. His father was publicly decapitated in front of Tosei traumatizing him plus he had to witness one pirate murdering his mother before his own eyes and take advantage of her dead corpse. This caused Tosei's sanity to shatter into pieces as Murdok was able to kill the pirate who killed Tosei's mother but was knocked unconscious by another pirate along with Tosei. After the carnage ended and the pirates left their home, Murdok and Tosei spent their lives on the abandoned burnt down island as orphans.
As seven years when by, Murdok and Tosei continued to live in the abandoned town hunting, training and living off of what they can find. While hunting for food for him and Murdok, Tosei came across a weird looking fruit on the ground that caught his curiosity. He picked it up and while searching for food, he ate the fruit then started to feel dizzy after devouring the fruit. When he woke up, he saw he changed into a Thunderbird. This frightened Tosei but quickly he was able to use his newfound devil fruit powers to hunt down his prey along with heightened senses with being able to tell where his prey was at(not known he had Observation Haki at the time) hunted down his prey and return it back to Murdok for them to eat off of for the next few days.
While their time in their dilapidated home began to get to the two, Murdok made a revelation that he wanted to become a pirate and hunt down the pirate crew who slaughtered everyone in their hometown. Tosei was highly against it and the two got into a heated argument that turned into a bloody fight which caused Murdok to slash Tosei's left eye. After their fight, they severed their friendship and Murdok abandoned Tosei by himself leaving him to start his life as a pirate. Once Murdok left, feeling betrayed and abandoned, Tosei decided to dedicate his life to joining the Marines and vowed to hunt down Murdok and kill him with his own hands.
Tosei Kidnapped/Joining The Marines
After Murdok left the North Blue to start his journey to become a pirate, Tosei left sometime later to join the Marines. During that time while out at sea, he began to slowly turn into an angry, vindictive and merciless feeling that everything that happened on that day was Murdok's fault because he wanted to become a pirate. While out at sea, he encountered a group of pirates where he was kidnapped and was subjected to torture. During the grueling weeks he was with the crew, Tosei snapped and without warning, he used his devil fruit powers and turned into his hybrid form and killed the entire crew leaving behind blood and body parts everywhere.
Tosei was rescued by the Marines who took him in and were astounded by how someone like Tosei was able to defeat an entire pirate crew on his own. Tosei wanted to dedicate his life to become a Marine in honor of his father to get revenge on the pirates who destroyed his home and hunt down the man who abandoned and betrayed him. Immediately, Tosei's training began; though in the beginning it was rough at first, he began to pick things up very quickly and was able to hone not only his fighting skills but his devil fruit powers as well.
First Encounter with Lovecraft D. Murdok
Weeks after Roger's execution, Tosei heard news about Murdok's crew being in the same town and went to confront them despite the refusal from his superiors. Once he finally confronted Murdok after five years, the two began to clash. During their battle, Murdok revealed to Tosei his new Devil Fruit power he obtained during his journey being the Inu Inu no Mi, Model: Simargl. The two former friends would clash with one another for three days until Tosei collapsed from exhaustion while Murdok walked away victorious, but sadden he'd lost his best friend.
Lovecraft D. Murdok's Mysterious Disappearance
Six years after encountering Murdok once more, he received word that Murdok had mysteriously disappeared. Though deep down he felt slightly worried about his former friend's disappearance but wanted to hunt him down regardless. However during the next six years, he would receive news about the rise of a new crew that's gained notoriety being the Rain Pirates and the main captain being Ame.
(more info to come for Tosei but this is what I have so far for him)
Trivia
Tosei when translated means "Winter Star"
His admiral alias, Gōrudokami, translates to "Gold Wolf".
His birthday is on December 21 which falls in line with the Winter Solstice.
Whenever Tosei is either in his hybrid form or his full-beast form, whenever he breathes, his breath gives off a staggering 135°C.
His favorite food is sukiyaki hot pot. His favorite drink is sake which is a drink that is associated with Ōkami(despite being able to change into an Thunderbird).
Link: https://onepiecefanon.fandom.com/wiki/Tosei