Thank you for your compliment! 4.6 is very near but I’ll shoot my shot to answer your question:

No, I don’t think she will die. Arlecchino is extremely powerful that I don’t think neither of Lyney, Lynette, nor Freminet able to win over her. She didn’t even use Vision nor Delusion to defeated Crucabena. Additionally, those kids value their familial relationship with their Father, therefore I don’t see any reason for her to die this early

Other reason is because Genshin faced a significant backlash from their community after Signora’s death 🤣 They also put a lot of budget for Arlecchino. She has a huge potential to be an important character in Genshin’s lore. Therefore, her death would be very unnecessary and seems to be a suicidal decision from Mihoyo…

Regarding her glitch, I have three theories about this: Either she didn’t came from this world (an outlander, not a descender), or she’s a Khaenri’ahn and the glitch is an effect by her curse, or she isn’t supposed to appear in this timeline 👀