source: wikipedia
Yukino later makes an appearance in both Innocent Sin and Eternal Punishment. In Persona 2: Innocent Sin, she is a playable character, working as a freelance photographer under Shunsuke Fujii (who she has had a crush on for a long while), and is friends with teen magazine journalist Maya Amano. Yukino also reprises her role as a mother figure, this time for Tatsuya and the crew. She is later replaced by Jun, deciding to fight alongside her former classmates from St. Hermelin once more to repel the invasion of Sumaru City by Hitler's Last Battalion unless certain conditions are met earlier in the game.
In Persona 2: Eternal Punishment, Yukino's role becomes short again as she becomes just a supporting character and assists in Maya's current assignment by getting in touch with her former teacher Saeko Takami, who now works at Seven Sisters High School. Yukino will rejoin the rest of her former classmates later in the game, fighting off the New World Order soldiers that are trying to take over the city.