|Fun fact: Ruben is Twitch’s real name but he got the nickname because he’s jumpy and flinches a lot.|
Twitch is scout like Jace and Cole but is very different from them. He likes to keep his head down and stay out of trouble. Like Mira, Twitch has some secrets he keeps from the inhabitants of Skyport. For one thing, he won’t reveal what his special item for scouting is to anyone.
(-via The Five Kingdoms Website)
He was a slave of the Sky Raiders, having been captured while he was adventuring from Elloweer, trying to find a champion to take down Renford. He was nicknamed Twitch because he is jumpy and flinches a lot. Twitch's special item as a Sky Raider is a ring which allows him to turn into a grinaldi.
He is short and skinny with blue eyes. He’s is around Cole age, though a little younger.
His true form has wings that are used for hopping, not flying long distances. He has a quartet of translucent wings, and his legs are like those of a grasshopper.
Before Twitch met Cole, Jace, and Mira, Twitch lived in the small grinaldi town, Kasori. Only grinaldi lived in the town and Brinkus was the champion and alderman. Nearby, a swamp people gathered together as a settlement, made Renford their leader and challenged Brinkus for Kasori. Renford won and was also able to beat Borus and take over two other grinaldi towns. When Renford's reign was worse for the people, Twitch bravely decided to go out and find a champion to challenge Renford.
Twitch could not find anyone in Elloweer to do the job so he sent out to Sambria to find one. However, with his grinaldi form gone and without a bondmark, Twitch was captured and sold into slavery. He was sold to the Sky Raiders.