Innocuous. Saba streams on YouTube; any NSFW content would get age-restricted or taken down. There's nothing immoral about a 20-something woman finding an audience streaming with a cute, petite anime cat girl avatar. (Or maybe 30-something, I have no idea her real age.)

You should be able to stream with an anime character of any body type you want, especially if it's your original character and you commission the art yourself, as Saba did. It's fantasy. When you choose your animated avatar's body type, it could match your real body type; be an aspirational body type you wish you had; or be a business decision responding to what kind of content has viewer demand. Who cares?