Gate Keepers EP18 - Protect the Invader!?

What is it that drives Fei to be a Gate Keeper? After an encounter with a mean-spirited vendor, she is faced once again with a painful memory from her youth in China. Fei will do almost anything not to relive the pain she has suffered from long ago.

Shun and the others trace a paranormal frequency to the old vendors house. When they arrive to investigate, Fei is there with gate open, ready to take down ANYONE who threatens him.