|First appearance||Team Building Exercise|
|Occupation||Agent of the Company|
18 years ago, in a train yard in Odessa, Ukraine, Maarten, his partner Ivan and their new trainee Noah, arrive to search for their target. Spotting him, Maarten generates some fire and stands with Ivan, who tells the man not to run. To try and escape, the Liquid Man becomes a wave of water that knocks Ivan away and puts out Maarten's fire.
Noah, amused at how his superiors have failed, makes some suggestions. Following Noah's plan, Maarten releases a burst of fire that forces the Liquid Man to run to a train. Ivan and Noah hold their guns at him while Maarten shoots concentrated streams of fire to block their target's escape. Scared, the Liquid Man runs into the train and Noah traps him. Maarten and Ivan thank Noah for teaching them some new tricks.
- In an email, artist Travis Kotzebue said that his brother Jordan was the model for Maarten, but Travis "put a cool Burt Reynolds mustache on him".
Maarten speaks and understands both English and Russian.
Please refer to Theory:Maarten for fan-created theories and other speculation.