Rosia's younger brother and Rita's younger brother. The son of the Terra family. He has a rather flirtatious personality. He likes to flirt with beautiful girls in various cities, which often causes Rosia trouble. Even though he has a wife, he still has a family magic that is similar to Rita and Rosia. He often uses this ability to win the hearts of many girls, almost causing him trouble. Because he has dated girls who have boyfriends many times. Even Daisy and Selene Bellefort, including Alona, ​​Rosia's adopted daughter, have been courted by him many times, but have never been successful. Therefore, Rosia has a headache with his brother's behavior. However, Merrick has good fighting skills. He is a swordsman and a fighting instructor for Brian and his sister. He also has a wife here, whom he met and married. Both of them still work here. And the Terra family does not force anyone to change their surname after marrying someone else. And many people know this well. But their children always have the same surname as their father. Merick, 2 sons and 2 daughters