Schalasaur? Well, now that I see what it's referencing... Good call, Slut! Also, yeah, the other tans should be in here, now that you mention it. But they'd all be the same from a gameplay point of view... The other ones will be allies like YES and NO; they'll give helpful tips and other things once myself or others think of them... Good call, all! To sum it up, this is what we have so far:
Allies
1-Tan
2-Tan
3-Tan
YES-kun
NO-kun
Mavericks/Auralmisos
Queue Tortoise
Trolling Vulture
Lawless Hyena
Midi-rip Chimpanzee
Plagiarizing Platypus (idea by Harmonious Dissonance, name by Binjovi)
Baudline Badger
Schalasaurus
Idler Mantis
Villain
Mr. Amgis
Gameplay Style
4-Tan shreds some riffs, the longer the solo, the more the charge shot, and fires sonic waves. As she defeats the bosses, she gains special pedals with various effects, which let her use the power of the bosses she's defeated.
Also, DJ SymBiotiX, I have no life, so this probably won't die out!