Ріверія Лійос Альф

Riveria has a serious personality. She is one of the only people that didn't laugh at Bell and condemned the others for laughing at him. She is also a strict mentor to the lower leveled members of her Familia, training Lefiya in her studies as a mage and Ais when she was a child. She is calm and collected during the heat of battle, dealing with unexpected events in a leader-like fashion, as shown in the event of the Loki Familia being attacked by large numbers of Virga on the 50th floor. Despite this, Riveria is kind to others, especially to her fellow Loki Familia members, earning her the nickname of mama from Loki.

Riveria hates to be called an "old woman" as she punished a 7-year-old Ais, who called her so, by tying adamantite to her and throwing her in water, calling it "swimming training". This later became a traumatic experience for Ais.