Jondy

X5-210, or "Jondy", is one of the twelve X5s who successfully escaped from Manticore in 2009. She was the sister Max was closest to during their childhood. Both of them could go without sleep for days, unlike most of their siblings. According to Max, a look of terror or grim determination would come over Jondy's face during live ordnance drills.

'09 Escape
Jondy ran alongside Max during the escape. They were separated when the ice beneath Max's feet broke. She was shot at just before the gate by Lydecker's soldiers, though she made it out of Manticore.

Post-Escape
Little is known about Jondy after the escape. Zack remembers that she has taken up residence close to the Golden Gate bridge in San Francisco and works nights as a waitress at a bar. When Eyes Only ran a hack telling all escapees to leave their current positions, Jondy called in to Zack confirming she had left.

Note
Jondy was only ever seen as a child.