English Genshin Impact voice actors don't get too much credit when it comes to minor characters, but it's worth noting that Xu's VA also voices Childe. At least, that's based on Griffin Burns teasing it in a tweet earlier this year.
Some internet sleuths also assume that Xu and Childe have the same English voice actor based on how they sound.
miHoYo has never officially gone on the record to say that Griffin Burns voices both. However, other VAs voice both playable characters and minor ones, so it wouldn't be unique to this particular NPC in this case.
It's even possible that Griffin Burns voices another minor NPC that players don't think much about.
The idea of Xu and Childe having the same voice actor rose in popularity around early January 2022 when Childe's VA, Griffin Burns, mentioned Xu. It's not a flat-out confirmation or anything, but their voices sound pretty similar.
It's a minor detail that some gamers won't care about, but there is a subsection of the Genshin Impact fanbase obsessed about it.
Naturally, users teased the two characters sharing the same voice actor in Griffin Burns' previous tweet. It can be amusing realizing that two completely different characters have the same voice.
The average Genshin Impact player might not recall who this NPC is. For those who don't know, he's an NPC in Liyue Harbor who works under Xingqiu. He's seen in several quests, but the most notable is Snapshots. This quest is the one where Travelers take two photos with the Kamera to test it out.
The Kamera is a nifty gadget that allows users to take snapshots in conditions where the normal camera can't, such as when they are in combat. Besides that, he plays a small role in other quests (such as Xingqiu's Story Quest).
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