the legendary warrior that trained
Yuki and Moriya
Minakata. After Shinnosuke
Kagami's aborted plan to remove the seal on "Hell's Gate" and
bring about a new world order, Gaisei presumably stood up against the guardian
in an attempt to stop him. Unfortunately, Shinnosuke is too powerful, and he
dies in the battle. He is later discovered by his three students, who all vow
to take revenge on his killer. Kaede accomplishes this, activating his power
of the Seiryu and defeating Shinnosuke. This also clears Moriya's
reputation, as he was originally blamed for killing Gaisei.
In Last Blade 2,
Gaisei is still deceased. However, an unknown force of evil resurrects him and
drives the now-undead warrior insane. Additionally, he manages to combine the
legendary powers of Suzaku, Seiryuu, Byakko and Genbu into his being, making
him much more powerful than before. The now godlike warrior roams the lands
and is called "Kouryu", the Yellow Dragon.