Legend... ever heard of love at first sight? I am assuming that Schala, from the tesseract, can feel the emotions of many people across space and time. We, in our daily lives, come across many people, who is in pain. And we don't give it much thought. But sometimes we find someone whose emotions, whose pain, touch us very deeply, without a particular reason.
Schala felt an emotion, a pain, that deeply connected with her, somehow. She fell in love with him. At first sight.