That she won't come out of the kotatsu is fundamental.

Hatsuyukii, food is ready~

Moves swiftly.

Hatsuyuki, show me your panties.

Scary when mad.

Occasionally shows her face.

Eh, sortie...? ...Really?

Very rarely, Mochizuki also shows her face.

Seriously bothesome~

Kotatsnail type destroyer Hatsuyuki's ecology

Gets really mad when touched.