Heartless

Rosa, she is Selflessness, literally. The reason people sometimes care about others more than themselves is because of her. Rosa has a... different life than you would expect. She is summoned when needed and disappears when her purpose is served, or sometimes, depending upon the circumstances, ends up dying and then disappearing. She gains different powers each time she is summoned and the powers are vital to her success. Now she's been summoned once more with the purpose of helping a young girl named Calissa Evans. Calissa is at important crossroads in her life. She has two clear options in her future, one dark and one bright. Rosa is to help her get to the brighter one though, doing so may be harder than she originally thought as she learns the shy 16 year-old's secrets.