List of expys in Genshin and Honkai (not comprehensive)

I'll start with the obvious, others may be more opiniated. If you hate the idea or can't stand disagreements with your own headcanons, just ignore the post.

Mei Raiden/ Ei Raiden : Her looks, name, element, weapon. Mei sometimes becomes similarly intimating. Electro archon and Herrscher of thunder. Both motivated by the loss of someone. ✅✅✅

Wendy / Venti : aside from being genderbent, the black hair , emerald eyes, wind element stay physically the same. The choice of names is a pun. Anemo Archon and Herrscher of Wind.✅✅✅

Yae Miko / Sakura Yae : no need to elaborate here except that Sakura indeed works as a "Miko" in one storyline, which is roughly an exorcist. ✅✅✅

Klein / Qiqi : Her looks, the mannerism particularly her protocolar way of speaking, her assistant job for a scientist who is another expy. Never seen it mentioned but still there ✅✅✅

Baizhu / Mobius : creepy scientist contracted with a snake and who seeks immortality. Nothing more common. ✅✅✅

Jean / Durandal : upright and hard workers, highly ranked member of an organization. Both character screams chivalry. By the way Durandal is a sword from a french legend. Jean is a french name and I guess inspired from Jeanne d'Arc who is a most famous female warrior✅✅

Zhongli / Welt Yang : Geo Archon and Herrscher of reason. Interesting that Geo element has been associated with rational personality in fiction. Very serious but one runs an anime studio while the other is a broke dude lmao ✅✅

Himeko / Diluc: Tall and redhead, use two hand swords, fire element lore wise. Specific interest for alcohol especially wine. Yes,I know about Murata BUT we don't know anything for now aside from her name. For all we know Diluc could be the current Archon ✅

Rita and Lisa : same vibe as a seductive character , third in charge of Favonius/Shicksal. Similar looking name, Rita Rossweisse has a german last name while Lisa is from Mondstadt ✅