If he's paired with Nana's her XP-55, they'll interact each other.

Drift Mines:
Each Drift Mines deployed by Harith's Fiat G56, Slowly wander in a zig-zag motion while gradually speeding up until they hit their target.
Cluster Laser:
Harith charges up energy & fires a narrow Cluster Laser which covers most of the screen's Y-axis & can pierce enemies.
Junkers Attack Formation:
Calls 3 Ju-287 Bombers. Each ally bomber deploys side gunners that decimates enemies with hail of bullets. Lasts 10s.