FFT Riddles

[conan]

Alright, here's another riddle from me:

I jump high. You cannot break my equipment. I counter your attacks. I am killed, and my killer fights you with 2 others. One of them can fly later. He has a crew with him of a job you won't see in any other storyline battle. This job's skill set is used by a boss you will face. When you encounter him much earlier in the game, in the room where he is someone is killed. In the building where you see this killer before you fight him for the first time, there is someone held captive. In the last scene where you see this person, the boss there is first seen in an earlier battle. The monster from that battle has a built in support ability, which can be learned by a certain job. There is a battle where you fight 3 of these, 2 of another job, and 1 of a last job. Directly before that battle, you will have beaten a boss. That boss is later killed by you, and the battle after that has you facing a different boss. Another character in the game can use the same abilities as this boss. The place where you first see this character, there is a battle just before it, where there is a boss. Who is that boss?