WOO okay here's my first ever human oc, his name is Tadashi Eric, at one point after his high school life he changed his surname to his wife's name.
In high school he was at the top of his classes, pretty much good at everything except for physical education, while he knew strategies, he couldn't actually enact them because he was too physically weak to-
Growing up he thought he had to be mature, his idea of mature would be just like his father, which he admired so much, until an incident happened and caused him to lose his vision 👊😔
It was a night where his father lost his cool after hearing horrible news about their mother and decided to take it out on his little brother, only for Eric to get in the way and protect him instead.
Only after then did he lose his trust in his dad and grew a mutually hating relationship with him, however his dad's mindset was already engraved into his.
To be mature is to be blunt, strict, level-headed and be the superior.
Which made him a bit cocky when it came to the only trait he liked about himself, his intelligence. He was really hard to approach in high school by his peers and even his brother, their hatred for each other started to grow.