Internet Memes

I'm doing a study on internet memes and modern internet culture. two memes that have attracted my interest are the "desu"'s and the "Charing mah lazer".

What does Desu mean and what does it have to do with a girl with one green eye and one red eye?

What does it mean "I'm Charging Mah Lazer" and what does it have to do with Cell from Dragon Ball Z?

Desu is the Japanese verb "to be." There is no intelligent reason that Suiseiseki uses that word at the end of a sentence for no reason.