Started playing Smoke this season, mostly using Lao.
Finally decided to lab out the kameos and I was surprised how good Sonya is. I never hear anyone talk about her. But she lets him convert off of literally everything.
You can go into full combo from the obvious f32 and b21, but also from f4, db4, and f1224!!! That's crazy. The max damage is a bit lower than Lao but I think the versatility more than makes up for it because even meterless you're doing +200 dmg off per touch on several other strings.
What do you guys think? Obviously her neutral is worse, though she does give him an ok projectile.
Goro was similarly able to convert off of everything, and adds a grapple mix. But his cd might be too high. Haven't tried him in live matches.