Felicia is a small girl with a red hair. She uses a butterfly ribbon in her hair and dresses in a Gothic like black dress. She's often seen with a black umbrella in her hands.
Nikotama is a outgoing girl with her acquaintances but with other persons she tends to be reserved. She was not seen in action however her showed had a great knowledge about various games and tactics. Felicia is a great observer too,demonstrating this in a lot of moments, principalyl in the confrontation between Haruo and Hidaka.

(Source: High Score Girl Wiki)