>>929965009 out of 10 times when a girl says this she's just pandering.
To be a female vtuber you kind of have to act meta attracted to be accepted by the wider audience. Which is to say you have to express availability to your male viewers without coming across attracted to them. So you're essentially acting heterosexual but in a way that the sexuality is directed at yourself. It's kind of tranny like. Of course lolis are the epitome of femininity due to their neotenous features so expressing attraction to them is peak pseudo meta attraction and signalling to their audience.
What I can't understand is how Marine got such a big audience while being an open fujo. Usually that's male repellant. I guess she's just entertaining enough that it offsets it.