Coopa (クーパ) is a ten year old girl with a very enthusiastic personality. She is Melt's servant. When she was taken by a large Slime in episode 3 of The Tower of Druaga: The Aegis of Uruk, she was saved by Jil's party and presented them to her master, the two later joining the group. She is also the party's cook. Coopa has little direct relation to combat, more often utilizing her domestic abilities to support the party by providing them with nutritional meals from a combination of rations and monster meat. While she tends not to announce the contents of the meals she makes, she makes no effort to hide what she uses if asked. In and out of combat, Coopa is shown to have enormous strength for her stature. In episode 11, she is seen carrying Melt's rods and piggybacking an injured Utu.
In battle, Coopa mostly acts as a caddy to Melt, passing him the rods he requests, though apparently she often has to correct her master's error and give him the one he actually needs. She is also quite skilled in making explosives, and often utilizes smoke bombs to cover the group's escape. Coopa is very polite to everyone, using the "sama" suffix when addresing others. Also, despite their constant clashes, she is very loyal to Melt, partly from family honor as hers has served his for several generations, though in one episode, Melt fired her after an argument. She is constantly trying to improve Melt's manners to make him a proper gentleman.
In the Tower of Druaga: The Sword of Uruk, she became Melt's secretary at his resort unaware of its role in Melt's Ponzi Scheme. Until episode 7, she and Melt traveled with the Golden Knights. They now once again travel with Jil's group in pursuit of Neeba and Kaaya after their betrayal. In the epilogue, she and Melt serve Kaaya as her retainers. She is voiced by Minori Chihara in Japanese and Monica Rial in English.