Shotoclone: He has Ryu's bread and butter: Hadoken-equivalent, Shoryuken-equivalent, Japanese ethnicity, karate gi.
To Be a Master: This is why he's competing in the tournament.
Lee Dao-Long
Patricide: Ends up having to do this to his dad Bai-Hu in his ending. He's not happy about it.
Red Oni, Blue Oni: The blue oni to Sho's red, having a lot more calm and mellow attitude to him.
The Rival: He's positioned as one to Sho: they fight each other in both the intro and tutorial, and Player 2's cursor automatically starts on Dao-Long.
Inflating Body Gag: He can balloon up in size and slam himself down as an attack.
Roaring Rampage of Revenge: His comrade died. So he's going to beat everyone in his way up until he gets to Bai-Hu.
Stout Strength: The most portly of the cast, and still able to go toe-to-toe with the most physically fit of them.
Rila Estansia
Amazonian Beauty: Compared to Tia, she's a lot more bestial and well-toned, while still being fairly attractive.
Nature Hero: She has spent the entirety of her life in the Amazon jungle.
Wild Man: Her bestial fighting stance and attack animations should give you a clue.
Wolverine Claws: Has sharp nails (or metal claws attached to her fingertips) that she uses in combat, along with her greaves/boots having large claws on the front and back.
Alsion III
Breath Weapon: One of his specials has him exhale toxic gas from his mouth.
Egypt Is Still Ancient: He's the Egyptian representative. He's also a long-lived undead pharaoh.
Demonic Possession: He turns out to be an evil spirit possessing Dao-Long's father as a vessel, as a few endings reveal. The only way to get rid of him is to, unfortunately, Kill the Host Body.
Final Boss: Everyone will confront him as their final opponent.