Reona Nyūbara, performing as PAREO, is the keyboardist and a vocalist for RAISE A SUILEN. She attends Kamogawa Chuou Middle School as a second-year student. Her defining trait is an intense admiration for the band's leader, CHU², whom she addresses as "CHU²-sama" and sometimes as "Goshujinsama". This devotion shows through frequent physical closeness and clingy behavior toward CHU², paired with open verbal declarations of her feelings. She explicitly confessed her love to CHU² and committed to expressing her emotions without hiding them, once hugging CHU² while declaring her unbeatable status within her heart.

She possesses multicolored hair often likened to cotton candy and exhibits an energetic demeanor matching her band role. Within RAISE A SUILEN, she performs keyboards and vocals during live concerts and recordings. The band plays original songs including "!NVADE SHOW!" and "Beautiful Birthday", featured in the concert film *BanG Dream! FILM LIVE 2nd Stage*.