Omg muichirooooooooo is that meant to be blood or his demon slayer mark?

𝓟𝓵𝓼 𝓰𝓸 𝓽𝓸 𝓶𝔂 𝓹𝓻𝓸𝓯𝓲𝓵𝓮

❤️ I loved Muichiro