(Necro time)
Your art style and designs is pretty versatile, so its hard to pinpoint just one series tbh. Like, your character Taiychka really could look like they belong in Demon Slayer or Mononoke (the Toei one) but I also saw some of your more colorful and modern-ish designs like this and this? Your art do seem like it'd be a perfect fit for a work made by SHAFT in general though :0
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@ Next person my art gallery is here!