- Mio Naruse: Maria is Mio's guardian and she loves her like a sister. She is even willing to sacrifice her own life in order to save her.
- Basara Toujou: Maria likes to tease Basara whenever she can. Despite this, she likes him and she considers him her brother. She has feelings for Basara.
- Shella: Maria's mother who was imprisoned by Zolgear. In order to free her parent, Maria had to act as Zolgear's spy in her espionage unto Mio and Basara. Fortunately, she is rescued by Lars.
- Lucia: Maria's elder sister who is also a a loyal follower of Ramusas. Due to her strict nature Maria fears her.