『Ryuu Lion』

An elf waitress at the Hostess of Fertility and Syr's friend, who supports her with her crush on Bell, occasionally helping him and the Hestia Familia for her sake(Which regarded her as an unofficial member of the Hestia Famillia). She was a high-ranked adventurer from the Astraea Familia, until her Familia was ambushed in the Dungeon by a rival Familia and all of the members, except for Ryū, were killed. Ryū avenged her late comrades by destroying the rival Famila using any means she could, including traps and assassination. As a result of her actions she was blacklisted by the guild. Despite this, Mia took her in. When Bell and the others go missing, she volunteers to join the quest to rescue them despite the Guild's black mark and proves herself to still be a skilled fighter. Ryū assumes a pivotal role in helping Bell defeat the Goliath on the 18th floor and later assists him on several occasions. During the war game between the Apollon and Hestia families, she helps the Hestia family, after Hermes and Syr beg her. She is the main character of the sidestory series Familia Chronicle Episode Ryū which provides more details about her past and other adventures.