Here you throw your two cents on the purpose of this character.
Here are my ideas: That he...
1: might be a trap, and is actually the Spring Maiden
2: might be a trap, and is the next Maiden
3: Is a twin/sibling to the Maiden
4: Is near the Base of Operations of WTCH
5: Is of course, important to the battle against Salem
And as Rexfrost pointed out, he could be related to Penny in some way.