I've always found Sydonay's laying waste on the various Outlaw headquarters around the world as something too disjointed to be focused on, but oh well, I liked Miss Yu Xuan's character design. (Remember that a certain Flame Haze by the name of Dorel Kubelik has also been burnt to a crisp on the Second Season.)
I have yet to see the episode though, and I need to see what Stolas (the headless bird-thingy) and Ribesal (the guy who looks like a scarab beetle) look like in the Second Season.
Also,
Stolas appeared on the Second Season, although it's just a sneak peek.