Koos 🆗 is a user on octodon.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
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The yukata seems like a nice bathrobe alternative
https://octodon.social/media/qqjSto8Nsj7ywWpUitM
It's basically a bathrobe with a better sash. Although I'm not sure I could put such a cute bow on my back.
I also don't know why there's a sword.
