Mallek is an 'information specialist' (he prefers this particular term to hacker or information technology specialist), and is quite skilled in his trade. The player notes the sheer number of computer equipment littering Mallek's hive, and the cerulean is also able to hack into shipment drones with little hassle. Despite this, however, Mallek isn't particularly impressed with merely reprogramming delivery drones, calling it 'weaksauce shit'. Even so, it should be noted that he still has a desire to command all drones so that he can control them en masse and create real impact on Alternian society.

He is quite laid-back in personality, not getting offended by the player's impoliteness and instead chatting with them amiably. However, the player later notes that Mallek isn't as calm and collected as he projects--Mallek is described to have weary eyes and a gloomy disposition towards his future in space. All this stems from the fact that Mallek has no desire to be shipped out to serve as a soldier or a spy for the Condesce, since his prized hacking skills will not be utilized in any sense. He also isn't particularly thrilled to be someone mid-caste, as the standards imposed on them are higher than usual. Mallek only loses his cool in two separate occasions: when drones attack his hive and when the player drops his phone in the river. During the former, he berates the player for leading the drones to his place before escaping; during the latter, he pushes the player into the river as means of retaliation, though he saves the player from a watery grave almost immediately and apologizes for his rash behavior.

While not one to actively fight for lowblood rights, Mallek is fully aware that the living conditions on Alternia aren't suited for everyone. He genuinely feels bad for the lowbloods as he doesn't believe they deserve the pain and suffering inflicted on them, and tries to be courteous to lowbloods he deems alright. Mallek has once offered Diemen shelter from the rough streets, and the cerulean has no issue paying his lackeys for a job well done. When the bronzeblood bows to him, Mallek becomes visibly uncomfortable and gives the troll an awkward pat on the arm. It should be noted that Mallek isn't against revolution on Alternia, though he has a bit of trouble envisioning that actually happening.

Mallek is noted to pay quite a bit of attention to his appearance, considering the fact that he has numerous piercings and uses black nailpolish as well as eyeliner. The player also notices that Mallek has a ring that could double as a brass knuckle, all in line with his punk aesthetic.

Despite being a ceruleanblood, Mallek speaks in a casual manner and sees no need for formalities of any sort. His hive is shown to be in a state of disarray similar to Dammek's hive: the sink overflowing with dirty dishes, random computer equipment scattered everywhere on the upper floor. As such it can be deduced that Mallek doesn't pay much attention to organization, preferring to focus on coding and other IT related stuff. 

I'd imagine him sounding like Tony Montana from the movie Scarface.