Andrew

Origins
Andrew was an inhabitant of Universe 7, and joined the universe's stink police at age 16. He patrolled several universes along with Gabe, his partner. He could easily move between universes, but had a crippling weakness: if he were ever exposed to extreme amounts of stench, his ability to move between universes would be no more.

An encounter with a stinky alien
Andrew and Gabe were on duty in Universe 3 as a response to a report that a being of extreme stench was found to be present within the universe. As they approached their target, the air around them became more and more unbearable; the air itself felt like an acid peeling away at their skin. The air became visibly greenish, and as soon as they saw the reported being, they both lost their ability of interuniversal travel. As Andrew and Gabe looked at each other, they realized that they would have to regain their power in order to be able to return home, and the first step was to defeat the stinky alien, Grace.