Quick answer — Shouko Ikeda worked on Sound! Euphonium 3 (Character Design), The Disappearance of Haruhi Suzumiya (Character Design), Liz and the Blue Bird (Original Character Design) and 12 more anime.
Shouko Ikeda worked on Sound! Euphonium 3 (Character Design), The Disappearance of Haruhi Suzumiya (Character Design), Liz and the Blue Bird (Original Character Design), Sound! Euphonium 2 (Character Design), Sound! Euphonium (Character Design), Tokubetsu-hen Hibike! Euphonium: Ensemble Contest (Character Design), Sound! Euphonium The Movie — May the melody reach you! — (Character Design), Sound! Euphonium: The Movie - Our Promise: A Brand New Day (Character Design) and 7 more.