omg Ive talked about this before actually

Yes:
Tilly - birds still exist in spltn so....I think it'd be very cute if he had pigeons or doves, maybe even one she rescued
Eight - doesn't necessarily want one but would like it if Tilly brings in any <3 neutral but loves animals so fine either way
Muzette - she likes caring for things! Maybe something small....I forgot where my list of like splatoon pet equivelents is but I think they'd enjoy the splatoon version of a hamster or mice (maybe copepods in universe?)

No:
Ami - animals are animals to her, she doesn't want one
Sinew - has no issue with pets but doesn't think he has the time and responsibility for one atm, maybe some day!