Ranna Himawari is a young girl with a notorious reputation as a Sukeban wielding a Bokken, often described as a "monster" for her sheer strength and brutality. She is the first main girl to fall in love under Rokudou's spell. Generally, Ranna does not speak or express much emotion other than emotional distance unless Rokudou is around, but tolerates his friends. Around Rokudou, she is extremely bubbly and smiles. She will not hesitate to stop and protect him when he is in danger, but will respect his wishes as she did not step in between Rokudou and Iinuma's fight when he asked her to and only attacked once he asked for her help. As a child, it is revealed that Ranna was adopted by an elderly couple because someone had left her at their doorstep. To their shock, even as a baby, she had a horribly demonic visage. Growing up, Ranna was nothing short of a demon for her cruel actions, even brutally dragging a priest tied to her tricycle. Thanks to special beads from the same priest, she became more demure, but reverted once they shattered. Years later, Rokudou would receive a pair of these beads, though now they completely pacify her, causing her to deeply fear them. Her surname, Himawari, means Sunflower in Japanese.

Rokudou’s miserable days of being picked on have taken a major turn with a new ability that’s made him the target of every delinquent girl’s affection. The source? A mysterious scroll from his late grandfather, an unusual inheritance to say the least. Now he’s in a romantic panic full of nonstop madness with every bad girl he comes in contact with. Will he ever catch a break?<br>
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(Source: Crunchyroll)

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Sumire entered the entertainment industry at the age of 9, when she was scouted by Space Craft's junior talent division. In 2009, she landed her first regular radio gig as host of Web Raji@Dengeki Bunko, and in 2011, she transferred to animation division of Space Craft due her interest in becoming a voice actress. On March 12, 2016, Sumire received the Best Rookie Actress award in the 10th Seiyuu Awards. She has also been a member of the seiyuu unit ".lady." since 2014.

Sumire is fluent in Russian and loves the Soviet culture, which she became interested in after hearing the State Anthem of the USSR in her first year of high school. In April 2010, Sumire entered the Faculty of Foreign Studies at Sophia University, and she majored in the Russian language there.

Sumire is interested in history and war figurines, particularly Russian/Soviet history, the Showa era, and likes the book Romance of the Three Kingdoms. She also has had a strong interest in games, anime and manga ever since she was a child. Her other interests consists of photography, lolita fashion-- she works as a lolita model-- and drawing, which she is quite good at. She also loves rock and heavy metal; her favorite bands are Metallica, Judas Priest, Black Sabbath, Dragonforce, and Kinniku Shoujo Tai. Additionally, Sumire is very good friends with fellow seiyuu [Sachika Misawa](https://anilist.co/staff/102337/Sachika-Misawa), who has called Sumire "her waifu".

**Non-anime roles:**
- Rosalie - Memento Mori (VG)
- Exia - Goddess of Victory: Nikke (VG)
- Drake - Goddess of Victory: Nikke (VG)

Rokudou is a loser, and everyone knows it. He is elected in school, receives malicious looks from passers-by, and can only muster the courage to complain in secret with his equally unhappy friends. Seeking to change his life, he desperately uses an ancestral artifact transmitted in his family for generations: a scroll that is able to subdue all demons. However, in the modern age it has a different effect: it causes all bad girls to fall in love with it.