The Wolf Incident

Krolia stayed on earth for longer than Keith ended up thinking. And he has a two years older sister, named Lizzy, who's a foster child. When Voltron comes back to earth, and live at the Garrison, Liz is out on a onem onth long mission. And when she comes back, there's a giant purple wolf in her and Keith's room (they used to share a room). And apparently her girlfriend knows how to handle it. The wolf is only comfortable around her, Melody, and Lance. And Keith is gone!?