has a variety of companions who join Commander Shepard during their journey to save the galaxy, and Mordin might be one of the most beloved crewmates that can join.
He's not a romanceable option, but he shares similarities to Tali and Garrus (who might be two of the more popular love interests in the series) when Shepard tries to speak with him.
This is mostly because he has a tendency to be busy and asks if Shepard can talk later, or he'll share an update on what he's been working on.
Mordin isn't available until, and even then, it's clear that he's dedicated to science and research more than anything else.
While a lot of his comments aren't about topics that relate to Commander Shepard or their goal of striking the Collector Base during the suicide mission, they're fun to listen to.