ThomaChi

ThomaChi is the slash ship between Thoma and Tartaglia from the Genshin Impact fandom.

Canon
So far, the two haven't met nor interacted. As Childe is from Snezhnaya and Thoma is from Inazuma (and was born in Mondstadt). However, they bare a lot of resemblances from appearance to personality.

Fanon
Ever since of Inazuma's release, whereas Thoma's appearance made its debut, a lot of people from the Genshin Impact fandom has made a lot comparisons between Thoma and Childe due to their resemblances. Therefore, people also started shipping the two due to their resemblances. This became much more popular after miHoYo, has posted an official art with them, seemingly hanging out.

Fandom
FAN FICTION