Genshin Impact: From Demon Slayer to a Winterland Harbinger

[Servant OOC warning: AAA. Overflowing with affection. Arlecchino] My name is Ye Caiqing. I never thought that an utterly ordinary fanfic girl like me would become a transmigrator and end up in the world of Demon Slayer. I can also gain the Harbingers' abilities by acting as them. Hehe, then I'll play my favorite, “Father.” And then, I'm going to make 100 friends! Shinobu Kocho, Daki, Mitsuri, let's be friends! Hehe, I'll make friends and then run away! Tartaglia watched Arlecchino make friends with everyone she met, looking completely speechless. “Forget it. Fighting suits me better.” Smack! (Kicks Muzan to death.) “Huh? You're actually this weak?!” Next up was another world: Jujutsu Kaisen. Making friends… Making friends in this world would be such a waste! Fighting! So! Fun! Yuki Tsukumo, Uraume, Takako Uro, let's fight! Take this, my 100% Black Flash infinite combo!!! The Fair Lady looked at her friend with a troubled expression. “Arlecchino, when did you become so... overflowing with affection?” “Rosalyne, there's something I want to tell you.” The Knave took the Fair Lady's hand, slipped an arm around her waist, and whispered softly. “I think it's time the House of the Hearth had a ‘Mother.’” “Ha! What are you talking about?” “How could I possibly be the ‘Mother’?” “But the children all like you.” “I like you too.” “Arlecchino, y-you can't just...”