>>416241"Koopa" is a character and she's sort of admitted she puts on something of a front when streaming so she can be more sociable and entertaining. Insofar as it's not a person sitting in front of a computer saying and doing whatever they would whether or not they were streaming, she isn't completely "genuine". She also usually tries to hide her power level, but completely fails in nearly every stream.
Relative to other chuubas, tho, I'd say she's very genuine and connects with her audience well.. At first it can feel a little uncanny valley to watch an anime girl with a sultry mommy dommy voice recite old-ass 4chan memes, but once you adjust to it, you get the feeling that it's all done in earnest and she isn't just hamming it up.