
Quick answer — Hitomi Takechi worked on Planetarian: Storyteller of the Stars (Character Design), Planetarian (Character Design), Dandelion (Main Animator) and 3 more anime.
Hitomi Takechi worked on Planetarian: Storyteller of the Stars (Character Design), Planetarian (Character Design), Dandelion (Main Animator), Sabikui Bisco (Main Animator), Hyperdimension Neptunia: The Eternity (True Ending) Promised (Character Design), Hyperdimension Neptunia (Character Design).