Family
Father
Sara's father was sick like her, and dedicated the rest of his life to painting a large oil painting. Sara hated art for taking her father away from her, as he devoted all of his life to painting. However, Sara's father died before he was able to finish his masterpiece. Sara, initially wanting to destroy the painting, began to feel sad for her father, who was unable to finish the painting he worked so hard on. Sara then took it on herself to finish the painting, eventually starting to love painting.
Kazamatsuri Family
Rinna Kazamatsuri
Rinna is Sara's adoptive sister. They know each other fairly well, and seem to be on good terms with each other. Rinna, who is often arrogant and childish, even recognized Sara's strength, which is greater than Rinna's.
Kouzou Kazamatsuri
Kouzou is Sara's adoptive father. He was friends with Sara's father, and adopted Sara after the death of her father. Kouzou also helped her to get her disease treated.
Hagun Academy
Ikki Kurogane
Sara believes that Ikki is the perfect model that she has been looking for. Sara wishes to paint Ikki nude for her painting, which would finish it. Ikki however is hesitant towards the idea. Despite this, they are on fairly good terms, with Sara having told Ikki about her past.
Nagi Arisuin
Nagi taught Sara the basics of cosmetics and clothes as they were shopping, most of which Sara found rather tiresome. They share a largely neutral relationship, with Sara having also told Nagi bits of her past.
Rebellion
Grand Professor
Grand Professor treated Sara's disease, due to Kouzou requesting it. This left Sara in Rebellion's debt, causing her to join Akatsuki.