Taroumaru is a former owner of Komore Teahouse in Inazuma and served in the Yashiro Commission's ninja division. Yes, Taroumaru is a ninja dog and this anime game requires you to combat him one-on-one.
Taroumaru's backstory is fascinating, considering that he's a dog. And this isn't the first time that he's returned to his ninja roots in a limited-time combat event. In Genshin Impact version 2.6, players fought him.
Back in April 2022, I completely forgot about it as a day-one player – HoYoverse has since expanded so much more, making newcomers seem to be even more confused as I became when Taroumaru appeared in Warrior's Spirit.
When Taroumaru is faced with a blade in his mouth, things get even stranger. He grows to be over twice his normal height when the match begins, and he also uses Electro attacks as if he were a Vision.
Taroumaru will inevitably never become playable, but maybe we can acquire a fake Taroumaru gadget as a companion, like we did with Cloud Retainer. That is, if HoYoverse ever adds companions that aren't floating.
Taroumaru isn't able to travel with them, but the Genshin Impact version 3.4 banners are giving you the chance to add Hu Tao and Yelan to your parties, two of the game's best characters for the main and sub-DPS categories.