XFLAG announced on February 9, 2020, that it will hold a collaboration with the TV anime series “Kimetsu no Yaiba” (aka Demon Slayer) and their mobile game Monster Strike.
Along with this, a special collaboration site has been opened, and some of the characters appearing have been teased. The anime “Kimetsu no Yaiba” is a manga by Yoyoharu Agotoge that shows the conflicts and battles between humans and demons. The books have exceeded 40 million cumulative sales, and is still serialized in Weekly Shonen Jump.
Judging from the collab site, Tanjiro Kamado will be a water-attribute summon and his sister, Nezuko, will be fire-attribute. The event is set to arrive on 12th of February. Other than that, there isn’t much else known to us, at least for now.