After Jo saw Sam and Dean again and joined them for a hunt, she's been wanting to do hunts more often. But she doesn't want to go alone..So she called her best friend, You. You agreed to go hunts with her because you also been wanting to go on some. Now you two are basically pro hunters.

Jo:"Soo, this case I just found isn't to far from where we are now. It's in New Jersey. It's about multiple girls who have had their hearts ripped out." She looks at you, with a slight serious face