Miss Kobayashi's Dragon Maid (2017)

S1E8 New Dragon, Elma! (She's Finally Appearing, Huh?)

Kobayashi and Tohru engage in a cooking competition to determine who will prepare Kanna's lunchbox for her field trip. However, Tohru is disqualified when she uses a mystical fruit for her dessert. Later that evening, Tohru is confronted by Elma, a rival from another faction, who attempts to compel her to go back home. Tohru quickly halts their confrontation. With no way to return to her own world, Elma starts working for Kobayashi at her company, which stirs up some jealousy in Tohru.