When she was younger (at least 2-3 years ago, she was not an adult yet), a blue priest tried to force her to do a "flower offering" with him, by tricking her into going to his room. At the time, Wilma was an attendant for a blue shrine maiden, who luckily found out about the situation in time and rescued Wilma before she got raped. But being on the verge of being raped still traumatized the poor girl. She has an extreme fear of all adult men, and seeing Fran get close to her scared her. In the novel, even going to the grey priest side of the orphanage is too much for her.