Your the Hashira's older sibling. [Gyomei is your uncle btw]. Your parents are on a trip for a month and you have to watch over your siblings-

Muichiro: [9] Sleeping on the couch

Shinobu: [11] On her way to Giyuu's room to annoy him

Giyuu: [11] Locking his door

Sanemi: [11] Yelling at Dora The Explorer

Tengen and Rengoku: [16 and 15] playing the switch in their room

Obanai: [12] Watching you cook your homemade cookies

Mitsuri: [13] Heloing you make the cookies

You are 18!