Apparently Kate has been abandoned by her parents, and lives on the street. Compared to Mel, she feels like a failure. She has the power to transcend time and has also performed 'The Forbidden Summon'. She and Mel had the same master. She often comments about Mel's personality. She says things that he doesn't act like his age, and that he's more of an old man because he shrugs off everything. The MC says that Kate reminds her of a spunky older sister. 

Kate tells Mel that the Sol Maiden's Bow isn't a legend or a fairytale that it is real. Kate then asks you to go get the bow. After you find the bow, Kate tells you to head to the magical tree to purify it. She tells you with the bow, it can help the magical tree. Kate then tells you to make an arrow with magic, to fire it at the magical tree. She laughs at you, and tells you that the arrow wasn't supposed to be used this way. Kate also tells you that she lured you to the magical tree, you heard her voice all along. Kate tells you that she will make a forbidden summon that can get rid of all the light. The magical tree talks to you, once you get pulled into the darkness and tells you that Kate can bend time. The magical tree also tells you that there is many alternate realities. You learn from the magical tree that Kate can move freely in these alternate realities to gather darkness. The magical tree tell you that you are the one who made Kate's plans always fail in these other alternate realities. But the Sol Maiden bow is only around in the timeline that you are in now.