This boss fires Two Arrow attacks from a distance like a machine gun. The attacks do low damage, though, so it's easy to tank the damage with high LP characters. Having a Silver Crystal 3 (or higher level versions) or Priests with 20 DEX should reduce the AT to 1, allowing the characters to survive easily. Ice and Thunder type weapons are best against this boss. Poison type weapons are also suitable.
This is the first small boss to have LP comparable to normal bosses.