After Roto gets his normal ID back, Yureka is still around. Her presence hasn't been explained yet, but she is most likely a rogue AI. She may have been hacked, as her stats are all maxed out- strangely enough, her skill for specific spells and weapons are all at zero. Regardless, she embodies a unique power to mimic moves enemies use on her and retaliate with versions of them more powerful than the original.