Julie Yamamoto

Julie Yamamoto is Ben's girlfriend. She first appeared in Ben 10 Returns: Part 1 at Ben's soccer game and congratulates him. On their first date in Pier Pressure, she discovers Ben's powers, but much to his surprise, she finds it "cool." , when Ben's secret was exposed, she kissed him on the cheek for some encouragement. on some occassion, she was kidnapped, until Ben saved her life and called her "his girl" and she smiles.

Being an ordinary human, Julie doesn't possess any superpowers herself, although she's quite good at tennis, and shows some fighting ability in Pet Project where she takes one of the Forever Knights electric maces and easily knocks out several of the Knights with them (one of these knights being comically unintentional while she replied to Gwens acknowledgement of this by smacking him in the head). She's also the only one who can fully command Ship, making her a competent ally.

Ship reveals that he can "merge" with Julie. When Ship enveloped her, he became her battlesuit. In this suit, she demonstrates enhanced strength and great damage resistance, as well as the ability to fire various types of powerful laser weapons.

it turns out that Julie can understand Ship's language.