Mimi Tomo was last available to play in Genshin Impact back in 2021, so it's been a long time since the Unusual Hilichurl has had the limelight. As of now, it has not been confirmed that the Mimi Tomo event will have a re-run, but because Hoyoverse has been known to recycle events every so often, we shouldn't rule out the possibility of a return.