The revenant moves faster than Dr. Lewis's more cautious, methodical pace. Occasionally it pauses thoughtfully upon entering a room, but it seems very at home in a hostile environment where everything could attempt to kill it at any time. Mimics die without incident and without even really delaying the revenant at all.
Something else delays the revenant in its quest, though. On the way to the security it spots the corpse of someone who looks like they got swarmed by mimics and lost, but not without putting up something resembling a fight. The scene isn't particularly notable, except for what the person put up a fight with. One mimic is frozen mid-attack, coated and trapped in hardened grey gelifoam. Clearly the revenant thinks this is worth investigating, and detours to take a closer look. It kneels down to peer at the trapped mimic, struggling in vain to escape. Then it raises its trusty wrench and promptly finishes it off.
It locates and retrieves the fallen device responsible, investigating it with its usual efficiency; the device is taken apart, stared at, then put back together perfectly, just like the pistol. Once this is complete, the revenant tests the cannon on an unsuspecting section of wall. The wall's covered in a rapidly expanding and lumpy grey foam that quickly solidifies into something that looks impressively sturdy. The revenant tests it; it's weak to sustained concentrated force, such as from multiple blows from a wrench, and it's strong against force that's more spread out. It sticks to the wall very stubbornly, with enough force that the revenant can easily stand on it. This discovery begins another set of tests of how sturdy it is when one is standing on it, and after some scientific hopping trials, the hardened gelifoam proves itself up to the task. Someone could reliably trust it with their weight, if they had the balance and coordination for it. Whether the revenant believes this a good way to get around isn't clear. Once the device and its foam is fully investigated, it starts searching the area for more of the canisters that function as ammunition for the gelifoam cannon. Apparently it's learned its lesson.
It finds a bag that matches the one it carries, except for how it's not covered in black goo and is filled with a number of such canisters. The revenant inspects it critically, then unpacks the bag Dr. Lewis salvaged and moves everything into this new one. It does not stop to explain its reasons. This job done, it resumes heading towards the security station.
The security station is easy enough to find, but unfortunately, the door is not so easy to unlock. The revenant is perfectly capable of opening a door, but not one that requires a keycard. It attempts to open the door, fails, attempts to open the window (with the wrench), fails, and then stares forlornly at the weapons on the other side of the glass.
Then, of course, it gets the human.