Alex is the one in the red, grey, and black striped sweater, along with the huge grin.
Despite all of this, I like him a lot. He does mean well (unlike another Alex I had, who also ran on rocket fuel, who seemed to delight in the discomfort and rage of his peers) and he's surprisingly affectionate. The best part, though, is that he's just so happy. Alex always has a big cheerful smile on his face and he always looks happy to see me. It's like everything around him is just so awesome.