User blog comment:Alishepard/Who is your least favorite Squadmate in the series?/@comment-5038903-20120807211910/@comment-5271559-20120807215658

Wrex was leading the united clans also maintaining and sending the Krogan forces to Palaven to help the Turians and rallying up all his supporting clans for the attack on Earth, thats why he could not join you. But I would have been happy with Grunt, he could have joined Shepard after he recovered, while Aralakh company was preparing to attack the Reaper forces on Earth, they were gonna attack along with the rest of the Krogan anyway, rather than attack separately, so they didn't really need a leader at that point.