I'm retconning the Assassin's HP to be 6 instead of 10.
Alec: 4: Alec blinks as the aliens collapse below. Taking a step out onto the metal grating of the stair, he chucks the extinguisher down below. It hits the ground between two of the beasts with a loud clunk. "Shoot it, She'!" he shouts, dodging back out into the corridor. The larger of the aliens shakes it's head bemusedly, the daze beginning to lift....
She': 5: She' grins, raising his arm. A pulse runs down the gun's muzzle, corresponding with Knolli's decimeter shrilling frantically, as he goes into a crouch, takes aim, and fires.
Dead on like Bonn-o-Tron. The extinguisher flips up, hit in the cap with one shot, spinning. The next bolt blows it apart in midair. The explosive result sends spiraling shards of metal into the beasts, tearing them both completely apart, and the intact steel end directly between the eye-spots of the large alien. [-7] [-7] [-5] It falls onto it's back again, completely wiped out.
Knolli: 3: Knolli takes a pair of shots at the beast in the back. It shudders, a stream of bile emerging out of it's chest at the impact wounds. [-4]
Knolli feels tougher! Aha! [+2 Total HP]
Fenix: Watching in the back of the party, Fenix feels a strange sensation ripple down his shoulders and arms. Raising his hands to his face, he watches, eyes wide, as his skin gains a silvery tone, and his knuckles bulge. He flexes his wrists cautiously, and his spike leap out. They're now silver-grey and razor sharp. [+1 Melee, +1 Total HP]
Current Floor: Sub-Level 15
Alec: Energy Blade: 10/10 HP: 2 XP
Knolli: Dual Blades: 12/12 HP: 0 XP: Armed, Pistol [+1 Ranged]
She': Plasma Gun: 10/10 HP: 2 XP
Fenix: Steelskin [+1 Melee]: 9/11 HP: 0 XP: Armed, Pistol [+1 Ranged]
Group Loot: Orange Card, Knife, Power Rod, Cykronium, 2 Medkits
Berserker: 1/10: Dazed
Hey SM and RM! Use XP to-
:Form a new mutation
:Attune your connection to your mutations, gaining +1 to relevant attacks
:Boost your HP by +1
Like what you said about RM's RPing skills, Knolli, RTDs are a lot less in-character. You can play it as you like, but going over-the-top is kinda the point here.