In which episode is Lemru's child Cynthia?

Lemru's child Cynthia appeared in episode 65.

Cynthia, the child of Rimlu in About My Reincarnation as slime, made her debut in the 65th episode.

About My Reincarnation as slime is a light novel written by Japanese writer Fuse, which was later adapted into an animation. The novel mainly tells the story that San Shangwu was reincarnated as "slime" after being killed by a random murderer, and his fate took a great turn after encountering the natural disaster monster "Storm Dragon Wildera". 20 14, 15, comic news was published in the third volume of the novel, 20 15, and began to be serialized on March 26th.