How can I get over a characters death fast?

Although it is quite normal to be sad when one of your favorite characters die. But the very best is to let it out and remember the good parts/times of the show that the character is from. But that is my perspective, if not then I recommend try watching a different anime to help burry the sadness.

One, make sure to put a spoiler alert in your question so that you don't accidentally spoil Code Geass for people that haven't seen/finished it ^^

Two, I feel you girl. I feel you. I got over it by watching things that are (I kid you not) fun, happy, lighthearted, etc. When my favorite character in another anime died, I literally turned on a Barbie movie. It worked for a while. I recommend finding a funny anime (I have a list if you need it) and marathoning it.

Well honesly when a character dies you grab the coziest blanket you can find, get whatever food you want, get your tissue box and you sit there and you cry because you want to let that character know that if you were you would have died for them. Then you get out your satan stars and you wash away all those sins that make you sad, and if your still sad go and kill something and light stuff on fire and let out all that anger......... Thats pretty much how I get over a charaters death.

If a characters death really got to me I'd re-watch the scenes from the series that I liked best.

I feel you. I watched the funniest episodes and recovered from heartbreak!