Yeah, generally you can chain P, K, c.S, f.S, HS, 2D in sequence providing you're in range for them to land. It's not a universal rule though! There will be a "Gatling Chart" for everyone somewhere that shows what combos and what is tight on block.
I-no is really good if you can control her dash for her mix-ups. Sol and Ky can also chase their projectiles if you're willing to invest 25% meter to Yellow Roman Cancel them. Ky lost his False Roman Cancel tricks in Xrd but they gave him his 5D and 236D projectile enhancer thing to make up for it.
I've been playing Millia-Rage and May but I don't really like any of their motions on pad (instant air dash cancels and Applause for the Victim setups). For playing people at work it's probably okay, though.