Suggested by Destroyer Ulquiorra is one of the strongest Espada in Bleach and would be able to take out Tifa pretty quickly. Tifa is certainly skilled as well, but in terms of power and speed she isn’t quite on Ulquiorra’s level. Then you have to factor in his 2 resurrection forms which take him to an even higher level. It’s just hard to see him being defeated in any context. Ulquiorra wins.