Thanks for finally noticing! She's called Ninja, and yes, she's the best.
A true GOTG fan would have called their furry little companion Rocket...
No, because 1. Rocket isn't a cat, 2. Ninja was born many years before the GotG movie was even announced, and 3. Why should I call every 'furry little companion' Rocket? I mean, I'd probably not even call a raccoon Rocket, because it'd just create an ambiguity for a name that has none. Rocket's also not a very good female name.
That said, Splatoon is cool.