Of course, I need to go to the ground base to get stuff, ya can find stuff ya need aswell. She says, jumping out of the treehouse, slicing through a herd of zombies with her katanas

Darius jumped down, his pistol in its holster, having recovered his knife, and pulls out the submachinegun on his back, and begins taking zombies down quickly.
(I just made an edit to Darius' powers, which would help explain why he's immune.)

(Thank you)
Lorean sighed putting in the passcode for the base, she waits a minute for Darius,

He's soon beside you, keeping the zombies off you while you work.

Lorean finds a few little metal objects, she also puts some electrical objects in her bag, Kay, lets go back.

Dsrius nods, his mask back on, and he's dropped the smg at his side, still attached by a sling, and has drawn his pistol.

Lorean sighs and grabs one of her katanas, jumping into the crowd of undead people, slicing through them as she runs back

Darius suddenly runs out of ammunition, and holsters his pistol, not drawing his knife, but rather swinging his fists, smashing undead skulls.

Lorean gets to the treehouse, panting, she looks back down, seeing Darius down in the crowd, she grabs a machine gun the was is the tree house, OI! HERE! She teleports the machine gun to him

But Darius is already covered, and his armor splits apart as he expands, his fur getting darker and taking a shine as his body becomes more lupine.