Warning! Some things may change from the canon timeline of Attack on Titan! Remember that this is a fanfic and I will try my best to explain everything to the best of my ability! With all of that covered, I present the Bio of Y/N L/N!

Speech:
Speaking in their mind ' '

Your Name: Y/N

Last Name: L/N

Hair Color: H/C

Eye Color: E/C

Race: Eldian

Titan Shifter: Yes

Relatives:
Willy Tybur [father, alive]
Lara Tybur [aunt, deceased]
Fine Tybur [sister, alive)
Alois Tybur [brother, alive)
Bruno Tybur [brother, alive)
Ruco Tybur [brother, alive)

Age:
12 (Year 845)

17 (Year 850)

21 (Year 854)

Height:
5'10 (Year 850)

6'2 (Year 854)

Titan Looks-

[ Source: https://www.reddit.com/r/titanfolk/comments/kjd4nc/people_seem_to_like_my_headcanon_for_this_titan/ ]

Human Scaling -

Combat: 8/10

Initiative: 10/10

Wits: 10/10

Teamwork: 7/10

Intelligence: 7/10

Endurance: 8/10

Agility: 9/10

Stamina: 7/10

Speed: 9/10

Background:
Y/N Tybur is the oldest son of Willy Tybur. When he was born, the Tybur family misinformed the Marleyan government as to who wielded the War Hammer Titan by saying that Willy had it. The Marleyan government soon found out that his sister, Lara Tybur wielded the Titan power and so there wouldn't be any proof of any kind of suspicion against the Tybur family, they forced Willy and Lara to make them give their Titan power to Willy's son and to be enlisted in the Warrior Unit. Lara agreed even with Willy's pleas and so Y/N was given the War Hammer power. The day he enlisted to the Warrior Unit, his father told him of his family's sins and how to make up for it. To stay alive and come back home to his family.