In the gameEdit
Despite using mostly dark types Ren is a caring and passionate person. However his passion and drive to change occasionally blind him to anything but his goal and impact his decision making heavily. This is especially seen whenever someone tries to interfere with his personal mission: Achieving peace and mutual acceptance between Goldenleaf and the rest of Aevium.
The protagonist meets Ren for the first time at Jenners lab after they receive their starter where he challenges them to a battle. Regardless of the outcome the protagonist and Ren officially become rivals from this point onward.