Rumani

Rumani is the leader of Nepenthe, Tetra Line's squad used in maintaining physical health through exercises and sport activities. Rumani is notorious for being highly persuasive to other people into exercising. While she mainly acts as a fitness instructor, she also serves as an internet influencer where she shares pictures and exercise videos. She runs the Body x Body Gym.

A member of the Nepenthe Squad. She serves as a personal trainer responsible for enhancing human muscle strength and overall physique. As the lead trainer at the prominent Body X Body Gym, she has gained both popularity and a large client base among its members.

"I have to work out every single day. If I don't, I'll lose definition in my muscles."

Rumani is a famous fitness trainer and influencer. She believes that staying healthy is of utmost importance and is known to trick persuade people to get gym memberships. When doing her job, she pushes people to their limits and then some, even if she can get carried away at times. She's proud of her body and how fit she is, even if she is a Nikke that doesn't need to exercise. When upset, she tends to vent her frustrations while working out. Rumani is attracted to muscular men.

Rumani possesses a lean and athletic physique. Despite her role as a fitness trainer, some fans have noted a lack of pronounced muscle definition, particularly in her arms. She typically wears a sporty outfit suitable for her role as a fitness instructor. Notably, her leggings feature the "Octopus" brand, a detail shared with other characters like Liliweiss and Liveryn, suggesting a popular in-game athletic brand. Rumani underwent subtle design changes. Her hair became slightly curlier, freckles were removed, and her eye makeup was adjusted to give her a more mature appearance.