Age- 16-18 before he becomes a demon Skills Same as Tanjiro Can see very far He is very smart He is very fast and strong His sword skills our above God level ( aka the same skill level as the one who almost killed muzan) His breathing style Fire( aka sun) Moon Water And the Eclipse style Eclipse style abilities Like fire style it produces flames but these flames aren't normal there a white color and our as hot as the Sun x 10 and it's like the moon style Izuku made this style while combing moon and fire Blood demon art when he is turninto a demon Exploding blood All of Muzans abilities Izuku wont turn into a demon until he defeats muzan
His harem
Shinibu Kocho
Mitsuri kantoji
Nezuko
Fem Giyuu
Kanae ( will be alive)
They all will be around 18 or 20 When he is a demon his eyes will be like muzans but silver