
Quick answer — Hitorie performed 1 anime theme, including "on the front line" from Mushoku Tensei: Jobless Reincarnation Season 2 Part 2.
Hitorie performed the anime theme songs "on the front line" (Mushoku Tensei: Jobless Reincarnation Season 2 Part 2).
Hitorie's first listed anime theme is "on the front line", the opening of Mushoku Tensei: Jobless Reincarnation Season 2 Part 2.