Khan's character's entire set of apparel (which from the reference seems to cover a huge amount of his body) is nigh on indestructible at 50x the durability of Kevlar, so yeah, there is a slight issue there.I believe the character was made when everybody else's, weeks in advance and in a PM to Rilla.
His character also has a power that literally negates water magic, that sounds like a slightly bullshit power considering this character was made post everyone elses being revealed.
Unless he made edit to the character and included some new abilities but it's unlikely. Guess we may want to wait for Rilla to confirm things.
Technically the water shield seems to require at least one prep and can only last for 5 "turns" and can be broken by charging an attack as prepped up as the shield.
Also I really-really can't see why would a 10 or even 50 times kevlar durability clothing an issue when we are powered characters who semi-regularly make craters, destroy wall sections or perform similar acts of destruction. Sure, it'll be bulletproof and may help withtand indirect explosions like hand grenades but that's about it.