Honestly, I wish my brainrot would spread to all characters equally, but unfortunately, my brain can only process two families at a time, and it chose the ones that are the most kindred spirits (sun in Сancer, moon in Aquarius, ayo).
So for the other troll kids, the hc collections will probably be small and only with their faces. And the first on this list are:
Both Captors are incredibly scrawny and wiry, and are among the tallest trolls among their peers. And even so, Sollux is taller than Mituna.
Mituna's hair didn't always resemble a fluffy ball of tufts and curls. Before the overexertion, it was straight, like Sollux's. However, under the influence of static electricity, it constantly lifted, tangled, and matted until it became what we see now.
Yes, this also means he gives you a static shock if you touch him anywhere but his suit or helmet.
Besides slurred and incoherent speech, Mituna's brain injury affected his coordination and muscle control. This resulted in facial asymmetry - one of his eyes is always somewhat drooped, and when he tries to smile, one corner of his mouth always opens wider than the other.
Regarding his personality, it's not that the brain injury altered it as much as it might seem from the outside. In reality, it just stripped away all his internal filters and inhibitions; the barrier between his thoughts and his mouth disappeared, preventing him from keeping certain thoughts to himself.
Sollux's hair grows very fast, and he most often cuts it himself. Hence the "barcode bangs" and the uneven, sticking-out strands.
Sollux also has acne - a consequence of constant nervous tension, stress, and, interestingly, pollen of the mind honey.
P.S. I have something BIG as a WIP so for now I'll post these small sketches, pls, don't be disappointed :')