Melusine (Final Fantasy V)

Melusine is a boss in Final Fantasy V and the first Demon of the Rift encountered. She possesses Lenna, but is thwarted. She is fought as a boss at the Guardian Tree with four different forms.

A fifth enemy called Melusine with the same sprite appears in the game's data, but is a dummied enemy with no appearance in the game itself. She would also appear to be the only Demon of the Rift who isn't seen in the cutscene where Exdeath summons the demons.

Battle
Because Melusine constantly changes weaknesses and strengths with Barrier Shift, the battle can be a challenge. She uses elemental spells in their strongest forms; if she casts Firaga it indicates her barrier is weak against ice, and vice-versa. Melusine is not immune to Confuse.

Strategy
The party should try to hit her with anything non-elemental, or use physical attacks. The player should watch for her to use strong spells like Firaga or Blizzaga, and make sure at least one party member has a Flame or Ice Shield equipped.

With a party of Black Mages, one of which can summon, one can summon Carbuncle, then use Firaga on the whole party to reflect it to her, defeating her in only a few turns, before she can switch barriers.

A Mystic Knight using Firaga Blade can also finish her before she changes her barrier.

Melusine is not immune to Confuse from the Dancer's Tempting Tango. She can also be put to Sleep (Status), then attacked with magical spells so as to avoid waking her up for an easy victory.

Etymology
Melusine is the name of a water spirit in European folklore, appearing somewhat like a mermaid.