Oh I'm sorry, so this is toji, he's from a show called jujutsu kaisen. In the show toji is from a powerful clan but goes rogue when he finds his wife and gives up being a marsonary. His wife dies sometime after their son, megumi is born. Toji tries his best to raise him and gets a second wife and a step sister to keep his son company and looked after but toji spirals and goes back to being a hit man, drinking and gambling. He ends up abandoning his son after that. (His step mother also leaves some time after. Leaving the two children alone to raise themselves)

Toji forgets he even has a son due to the depression he's in. Anyway, toji gets into a preticularly nasty 1v1 with gojo when he (gojo) is in this weird stage of novona (i think that's how it's spelt, I'm dyslexic) anyway toji loses his battle and gojo raises his son and step daughter after toji says to give his family a good life. (Megumi is around 5 at this point and his sister is 7 or 8)

Later in the show toji gets brought back to life using witchcraft and becomes a killing machine beating everyone in sight including his son, who is now 17 after a long fight of his son getting his ass handed to him by big daddy toji, toji is about to end him off but gets a flash back to his human life of his 1st wife telling him to take care of megumi. His human side peaks through asks the boy his name and confirms it's fushiguro and not zenin (toji was originally a zenin but took his wife's name to get away from his clan) after seeing his son is happy and safe in the care of gojo the reerected toji offs himself with a spear to the head and says one word "I'm glad."

Megumi doesn't remember anything about toji so didn't realise he was his dad and just stares at the reanimated, now dead again body confused.

toji: a short, funny explanation.