This is fanon to the series of Voltron.

Keith is a galra,but also an orphan.He was staying with Zarkon and the other Galra's for god knows how long,Keith is 17 now.

He was captured by Shiro one time and brought to the Voltron ship.Allura decided to let him stay because apparently Keith meant no harm to them even if he could harm them.

So,he stayed with them.He was mostly calm.He had been the closest to Shiro,and sometimes wih the others.

Right now,Keith is in his room,sleeping.

(You're Keith.)