In battle, Straw Heads are capable of using a couple of nasty tricks. Their signature attack is S'crow Funk which can turn a party member into a scarecrow. They can also use Dark Claw which can poison a party member.
Straw Heads are weak to thunder attacks meaning any of Mallow's thunder techniques are effective against them. Also, since Straw Heads are undead enemies, a Pure Water can be used on them to defeat them instantly.