Well you don't have to, but it's something I'm looking for. Xalet's dark-side doesn't get much screen time because he hasn't had very many high-stress situations. It'd be fun to have it come out either in our current time or in a flashback. Xalet's a pretty physical character, so combat, sparring, or something of the like is the best way to do it. He's always in the Syliras area since he's been a Paige/Squire since forever, but that's a big area to work with (he does train outside of the gates sometimes when he needs some space and breathing room).
I'm up for other potential threads around Syliras, but digging a bit deeper into the dark half hiding in Xalet is one of my priorities. Feel free to send me a PM or reply here if you're interested, thanks!