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Let's go back to Japanese mascots, shall we?
B-but this one is on a Taiwanese airline?
EVA Air got a deal with Sanrio to put a number of their mascots on their aircraft. This was the first one, Hello Kitty, which, as I'm informed, has a Hellp Kitty themed interior and has flight attendants with Hello Kitty uniforms (similar to ANA Pokéjets having flight attendants wearing Pokémon themed uniforms).