Unlike with Beastmaster, there is no means to issue any commands to the charmed monster, even if a pet job like Beastmaster is used as a Support Job. Thus, the monster will do nothing except Auto-Attack any creatures that may happen to attack the user during the short duration of the charm. (Because Bards don't usually reach the top of the Enmity list, this isn't normally useful.) Like the Beastmaster's Charm, however, the Experience Points and item drops of the charmed enemy are negated even after the charm wears off. For players, this is thus generally considered a useless spell.
A virelai is a form of medieval French verse used often in poetry and music.