>>/9375/
>>/9384/
Having researched the (creepy af) show for a more detailed context of the character and, consequently, the cosplay and tiktok, my interpretation is that it seems to be a tacit acknowledgement on her part that Seth is...at least to some degree...precisely what his detractors have been saying he is for the past 1.5 years (Maru's sexual interest is both literally and figuratively a predator), while also rebuffing those who who would seek to help her get away from him and, in the process, treat her like a "helpless child" or something. This is interesting because previously it was thought she was either ignorant or in denial about what he is, and thought his sexual proclivities to be a phase of some sort which was now behind him, as was indicated in certain leaks around the time of the first Twitch stream. If that is true then naivete would still be a defense, albeit a tired and familiar one. But it seems to me that she accepts and even shares his perversions and is proud of it.
Bolstering my interpretation are the blatantly jailbait themed audios she chose for the Delphine cosplay and tiktoks. It is all to say that she knows full well what he is and wants him not despite but because of it. It is to say "I am a girl who wants this depraved, unemployed pedophile (whom I acknowledge as such) to make me his DNA dump and rearrange my guts, I am willing to be hated and friendless for it, and anyone who ever thought I was anything else is a fool." It is truly fascinating and bewildering to see. You may say "You are overthinking it and seeing shadows", and verily this may be the case. However it is also true that she takes great care with her tiktoks and has been known to make some with him in mind, and enjoys antagonizing certain viewers, the fact that it is of course only to her detriment notwithstanding.
Make of it what you will.