In Kichikuou Rance, Lei is an aloof Dark Lord affiliated with the Kayblis Faction, who possesses a romantic relationship with an elderly woman named Mary Ann. Depending on the player's actions, Lei can be killed by holding Mary Ann hostage or by fighting him directly.
In Rance x, while Lei remains as a member of the Kayblis Faction, his relationship with Mary Ann is significantly altered. In this game, Lei meets Mary Ann as a child and befriends her, and does not become romantically involved with her until she reaches adulthood in Part 2. The player is also given the option to spare and recruit Lei, unlike in Kichikuou
