S1, E4: After going to Rainbow Forest, Gareki asks to stop by Karasuna. There they run into an old acquaintance of his from whom Nai and Yogi learn more about Gareki's past.

S1, E4: After going to Rainbow Forest, Gareki asks to stop by Karasuna. There they run into an old acquaintance of his from whom Nai and Yogi learn more about Gareki's past.