Xiao mains can rejoice in knowing that he won't be the shortest male character in Genshin Impact anymore, it's now apparently Heizou.
Although Heizou's model hasn't been leaked yet, a few credible leaks have stated that he utilizes the young male model (like Xiao, Bennett, and Aether.). It's better than nothing, but the more interesting leak is that he's shorter than Xiao, who used to be the smallest playable male character in the game.
Xiao is 5'3'' (160 cm), so Heizou is supposed to be shorter than that. However, it's not mentioned what the height difference is. It could be something as small as 1 cm for all fans know.
Height is predominantly a minor attribute in Genshin Impact (although it does affect the distance covered while sprinting). Still, some Travelers like to talk about minuscule details like it. In this case, Ubatcha states that Heizou is the shortest male character and compares him to some of the other short men of Genshin Impact.
It's worth reiterating that he will use the young adult male model and not something akin to Diona, Klee, Qiqi, and Sayu. These leaks also suggest that he wouldn't be using some shoes to bolster his height if he's still shorter than Xiao.
Some old leaks suggested that he would appear in Genshin Impact 2.6, but that might no longer be the case. The consistent part of these leaks is that this Inazuman detective will be a 4-star unit. He will also apparently have a Hangout Quest released alongside his debut (whenever that might be).
Nothing has been confirmed regarding his element or what his moveset does. Of course, other leaks mention him, but they're also unconfirmed (and, in some cases, contradict what's been previously leaked).
For example, this leak states the following about Heizou:
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