...how they treat her!
Whenever she makes a lewd comment or joke, these two either ignore or dryly stonewall her like she's some kind of disgusting and greasy female pervert coomer freak, the kind that stands outside your window and schlicks with her tongue out while staring at you with a crazed look on her face.
It wouldn't be so bad if it were just Mococo, but then you have Fuwawa "I fuckin' love Yobai" Abyssgard with her there and then acting like they're more innocent and pure than the Virgin Mary!
It wouldn't kill them to bounce off the lewd stuff Nerissa says, even just acknowledging it a little. It's certainly better than awkwardly killing the conversation.
They need to fix this somehow, because if this goes on, there'll be a breaking point, and one of these days, during an Advent collab, Nerissa's finally gonna snap because of this and she'll absolutely birder these two and I wouldn't even blame her when she does.
She needs help by being accepted for who she is and deserves to be loved for being true to herself.