Rena Ryuugu

Rena has an obsession with all things cute. In what the others call her "Cute Mode," she often tries to take such things home in her Take Home Mode even if they do not belong to her. Such things include the "Kenta-kun" doll.

Cute Mode, a comic relief quirk which is instigated when she is embarrassed or when she finds something cute. Once she enters Kawaii Mode, Rena's senses are heightened to an extreme extent, making her inhumanly agile and vigorous. This causes frequent trouble for many of the club members, who have to expend all of their energy to barely control her. She even kidnaps people in her "Take Home mode."

Rena spends much of her time "treasure hunting" at the town's trash heap in search of cute things which often appeal only to her. In the trash heap, Rena has a secret base consisting of an old van she has filled with things she likes to which she retreats when distressed. Nevertheless, according to Mion, while Rena might seem cute herself, people should be careful not to anger her as she can become quite scary and psychotic.

She is very sensitive about the topic of Oyashiro-sama, who she believes cursed her for leaving Hinamizawa.

Rena initially appears sweet and friendly but can become quite scary when threatened or angry. Rena strongly suggests that she does indeed hate lies, especially from friends.

Rena can become quite cunning and viciously cruel when she is determined.

the "quiet, blue flame that burns silently," referring to her capability of becoming incredibly powerful when push comes to shove, despite her seemingly girly and airheaded personality; in such situations, Rena will always be the instigator of and the most bluntly offensive in a fight.

Rena retains these abilities when she suffers from the Hinamizawa Syndrome. She reveals her capability for extreme cruelty When determined, Rena can be very perceptive, as she can somewhat understand people just by looking at their faces. She does admit directly that she can quickly.

When determined, Rena can be very perceptive, as she can somewhat understand people just by looking at their faces. She does admit directly that she can quickly detect when someone is lying when looking at them.