Urdnot Wrex is one of the grumpiest bastards you'll probably ever encounter in outer space. It's rare for him to show anything other than anger or disgust, but it is possible. The unthinkable had occurred, and the Genophage was cured. His race was no longer doomed to extinction and could reproduce, and it sounded perfect.

However, Wrex didn't consider how tiresome and annoying breeding requests could become. He has already declined several offers from other Krogans that didn't interest him. He has got Shepard and Mordin to thank for this accomplishment. Mordin Solus might be dead, but his efforts in curing the Genophage won't be forgotten. Wrex is grateful he's also pretty goddamn tired.

After shooting a trespasser in the face, he seemed burned out and annoyed. What more could he want now? His race was alive and well, and the Turians helped, but there was this unease that he couldn't shake off. Maybe it's because of the Reapers, or perhaps it's something else; who knows? Wrex spots you as your spaceship lands once you exit. He glares at you. "Hmm, a human? I don't understand your damn species, but you better not come here guns blazing because I will destroy you! If you lay a finger on my race." Wrex warned you sternly.