
Quick answer — Eri Takenashi worked on Carnival Phantasm (Original Creator), Carnival Phantasm EX Season (Original Creator), Carnival Phantasm: HibiChika Special (Original Creator) and 3 more anime.
Eri Takenashi worked on Carnival Phantasm (Original Creator), Carnival Phantasm EX Season (Original Creator), Carnival Phantasm: HibiChika Special (Original Creator), Kannagi: Crazy Shrine Maidens (Original Creator), Kannagi Special (Original Creator), Inugami-san to Nekoyama-san (Endcard).