Sida seems to enjoy character illustration above all, creating sections (Which I believe are worlds) in her galleries with names like The Copernicus Verse, Golden Age Magicians and populating them with characters that exist in them. There's a high level of fantasy to her pieces, which typically employ surreal or abstract elements to frame her unique characters (Think of Klimt). I kind of wish she'd share the 'internal lore' that obviously spurns the creation of these characters, but leaving it open to interpretation is not a bad thing either.
Chen is also highly prolific with her work, creating pieces on a highly regular basis- Probably part of the reason as to her major strides in improving her work. You can check out more of her pieces after the break, and this might be one of those artists to keep an eye out for in a few years time.