I think it's within character for Asuka to just be kind of a lunatic, it doesn't seem like a big departure for her to laugh at a time that makes no sense.
Looks like most eliminations is a 3-way tie between all of Damage CTRL.
EDIT: Actually Redirk might be right if Rhea was a part of the Nia elimination. Completely forgot about Rhea since she did so little in the first 2/3rds of the match.