So these are my theory's of Claire.
1. Might be Jay's sister.
2. Jay or Lloyd's perfect match.
3. Jay's daughter from the future
4. Has time travel powers.
5. 8th ninja
6. Tourist

You can see her shirt is light blue and jacket is green. Her necklace has the number eight.
8th ninja? JUST LIKE LLOYD PEOPLE!

The picture up top is her.