Collect 10 Frozen Fish by hunting .Black Guard, Red Guard, and Vicious Arbitratorin Hidden Argent Forest. Then give it to Ruchi. Use your quest tracker to see your progress.
Luch: Hm~ What should I do? NakanoAzusa: What can you do? Luch: Ahhh!! Oh! An Aitan! Mercy! Please help me. HiiragiKagami: What's wrong? Luch: I'm Ruchi. I came here chasing a scheming rat Luch: who tricked me out of all my assets. Luch: Now I'm trapped. I don't know how to get out... NakanoAzusa: I pity you. The exit is like, 100 meters from here. Luch: I have adapted to life here. However, I've run into a problem. Luch: The monsters are eating all my emergency food Luch: hidden in the forest!! NakanoAzusa: Oh! So, you're not like, trapped IN HERE so much? Luch: Erm, no. Look, I will give you a nice reward. Please?
Reminder Dialog
Luch: You don't really have to chase trouble for me. Just, Luch: if you happen to find it while hunting, please bring it to me.