What counts as a complex character? (FB)
Characters wearing a lot of jewelry (specifically if it has linked chains or other small elements), characters with more than four limbs (think wings), or clothing with an intricate pattern on it.
That doesn't mean any character with these features will qualify - if a character has simple clothing and wings, it probably won't count as complex. If you're in doubt, please send me a message!

What's the extra fee for a complex character? (FB)
It'll depend on how complex the design is. If a character wears a bunch of necklaces, it's probably going to be around $10. If a character has their entire feathered wings covered in flowers and jewelry, you're probably looking at twice the baseprice. Don't be scared to ask for an estimate though!