I started this Sunday but unexpected events kept me from finishing it then.
Basically, I believe Caesar probably feels guilty about many things. The main things being the fact he couldn't save his parents or his little brother. That is quite a burden to bear. Of course, his brother did make it out okay, but he left Rex for 5 years. That can't exactly be easy on him either. It's up to sweet little Rex to try and console his distraught big brother.
However I do not believe even Rex can pull Caesar out of this rut.
Caesar Salazar and Rex Salazar - Generator Rex (c) MoA
I was unsure of the random texture at first but I feel it gave it character overall.
Now excuse me while I go sob in the corner.