Who are the last 3 girls? I can't seem to recognize them

One of these girls is dead

I think.

tama chan, otsuu, and the girl of the soba shop

delaverno said:

tama chan, otsuu, and the girl of the soba shop

Nice catch on soba girl, I totally forgot about her. Are you sure that the girl second from right is Otsuu? The hair looks off, Otsuu usually has a sidetail.

Aquelle said:

Nice catch on soba girl, I totally forgot about her. Are you sure that the girl second from right is Otsuu? The hair looks off, Otsuu usually has a sidetail.

I think that one may be Mitsuba Okita, Sougou's sister. She's known to add chili sauce even on parfait.