愛沢 咲夜

Likes: Comedy, looking after kids, horse-riding
Dislikes: People who can't take jokes or don't like comedy, any life-form that eats fermented soy beans

Sakuya is Nagi's cousin from Kansai. Like Nagi, Sakuya is very rich and has a similar personality — loud, arrogant, abusive of servants, and unwilling to accept defeat in anything; Nagi is one of the few people who can stand up to her wrath, as Sakuya is the one who has known Nagi the longest.

Sakuya is obsessed with stand-up comedy especially in Manzai style. She encouraged Hayate to become a comedian because she believes that Hayate's life up to now is nothing more than a comedy.