
Quick answer — Myth & Roid and TK from Ling Tosite Sigure performed 1 anime theme, including "Ender Ember" from Re:ZERO -Starting Life in Another World- Season 4.
Myth & Roid and TK from Ling Tosite Sigure performed the anime theme songs "Ender Ember" (Re:ZERO -Starting Life in Another World- Season 4).
Myth & Roid and TK from Ling Tosite Sigure's first listed anime theme is "Ender Ember", the ending of Re:ZERO -Starting Life in Another World- Season 4.