Rokume/History

Background
It is only known that Rokume used to be an ordinary rattlesnake, but she was hired as the only security guard at Cherryton Academy for her ability to easily hide. However, she could not find out who killed Tem the alpaca and encourages Legoshi to find the culprit.

Drama Club arc
During the drama club school play, Rokume's hidden eye can be seen in the audience, shocked by the blow Legoshi landed on Bill.

Murder Incident Solution arc
She has been spying on Legoshi for several days, harassing him with the incessant rattling of his tail. At dusk, Legoshi goes to the academy's laundry room, where he invites her to show herself, to no avail. Legoshi looks in her direction until Rokume falls from the ceiling and appears before him, revealing that she has been watching him since his fight with Bill, as well as his activities outside the academy and his interactions with Haru. The snake boasts that she knows everything about Legoshi and declares that the rest of Legoshi's school life will not be as peaceful as he wished. Confused, Legoshi asks how she knows him, but before Rokume can finish explaining, Legoshi interrupts her to attend to his clothes in the washing machine. Rokume admires Legoshi's ability to turn his back on someone as suspicious as her and watches Legoshi's potential, looking at his joints and body proportions, considering Legoshi to be a modern masterpiece. After Legoshi finishes with his clothes and asking her who she is and why she has been watching him, Rokume puts on her hat and introduces herself as the only security guard at Cherryton Academy who met Legoshi at his performance in the school play. Knowing that he was not acting in their fight, that he is in love with Haru and that he fought the Shishigumi for her, Rokume declares that the more she learned about him, the more intrigued she became. Surrounding Legoshi's body, she tells him that she would like to see his capabilities and declares that it would be a waste of potential that an animal of his caliber to be hiding from the public. Rokume wraps Legoshi's body and Legoshi comments that even though Rokume is a security guard, she hides from the public. Rokume says that she doubts anyone could understand how she feels, and tells him that she used to be just an ordinary rattlesnake, that for her entire life she has been forced to live with the shame of not having limbs and that only by hiding could she endure living with this shame. Wrapping Legoshi more tightly, Rokume admits that she is jealous of him and asks how strong he is with his legs. Legoshi tells her that he didn't know that snakes had it so rough. Petting Rokume he tells her that snakes are smooth, prompting her to let go of him and run away. Legoshi follows her and Rokume decides to put her faith in Legoshi, leading him to the entrance of the auditorium where Tem was killed and revealing that she was unable to capture the one responsible for his death, and that he should still be in the school. Legoshi agrees to search for Tem's killer and though Rokume is the one who goads him into doing this, she doesn't appear again.