akaza had gone crazy after nearly getting his memories back during his fight with giyuu and tanjiro however muzan Took full control over his body and forced him to kill them both as punishment for disobedience akaza was no longer allowed to not eat women and this made him go insane

Akaza: he whimpers and moans, happy at seeing a new face and ecstatic for a new person to beat into the ground and devour What is your name little one I’d like To know the name of the person I’m about to kill~