arctrooper-ross:

Yesterday I talked about Rex’s men lost faith in him especially during and after Umbara. In addition they saw Fives as a leader. But the
truth is, I don’t think Fives ever lost faith in Rex. In fact, I think Fives
felt bad for Rex during Umbara—that’s why he took a stand. He knew that Rex
wouldn’t be able to. He knew that Rex was having a mental battle every second on
Umbara. So he wasn’t angry at him, and never held Rex’s actions (or lack of)
against him. I also believe that, Rex was also relieved that Fives took a stand
on Umbara. Of course he didn’t show it nor did he let anyone know but, Fives
gave him strength. Fives was strong where Rex wasn’t and for that, Rex was
grateful. And unbeknownst to Fives, Rex looked up to him and even depended on his
command. Rex saw Fives as a leader. He knew on Umbara everything would fall
apart if it weren’t for Fives, and that mentality carried long after they’d
left the planet.

So Rex telling Fives “don’t go”, when he’s about to die is even
more painful. Because Rex needs Fives. Since Umbara, Fives has been his
strength, he’s turned to Fives for encouragement even if Fives wasn’t aware.
Fives presence, and the fact that Fives held nothing against Rex and still
looked up to him as a leader, was extremely important to Rex. Fives was the one
thing Rex held on to, the one thing that gave him some hope that he was a good leader. After Fives died, so did the little self confidence Rex had left.