Here is the full list of all 14 Blade Ballet trophies - there are 11 bronze, 2 silver and 1 gold.
Kill a player by charging across the level
Kill Riot while she has all of her shields
Win a match as Steve
Cheat death with an invulnerability capsule
Win a match as Drop Jaw
Win a match as Syphon
Win a match as Trigger
Win a match as Ruckus
Win a match as Riot
Win a match as Catbot
Win a match as Vanguard
Win a match as Nix
Win a round without killing anyone
Win a match as Torque