post an ऐनीमे character knocking someone out in order to save his/her life

Zoro knocks out Sanji (One Piece)

Zoro knocks out Sanji to save sanji's life from Kuma......bcz Sanji was going to die द्वारा Kuma's hand.....then Zoro knock out Sanji with his sword and give his life instead of Sanji's to save their wounded captain Luffy............it was an epic scene..........and Zoro survived Kuma's torture............this scene दिखाना how epic character Zoro is..........heeh eh ehe e.

Going back old school on this answer haha....DBZ

In the future Trunks was knocked out द्वारा Gohan before going to face the androids. Gohan knew that he would probably be killed and he wanted Trunks to live on to be the last of their race.

Gohan was killed द्वारा the androids in that time dimension and Trunks lived on to travel back in the past to save the world. So not only did he save Trunks द्वारा his sacrifice but he saved the hope for a better future.

Natsu पंच Gray in order to make him stop using ice shell

Natsu did it to Gray too when he insisted to fight but couldn't since he was weak from the battle.