A.B.R.α

First Battle
The first true boss battle in the game, it also doubles as an small tutorial for the role of Reyvateils in battle. The A.B.R.α has the following attacks: Pulse Laser, which causes average single-target physical damage; Homing Bit, which deals physical damage to all vanguards; Powered Dive, which deals large single-target physical damage; and finally, Full Recovery, which partially restores its HP. Although this is a boss battle, the ABR shouldn't pose major problems as long as Aurica sings Boom for all the time her MP allows her, and you can use it as an ocassion to test out the Harmonics system.

Second Battle
Main article: A.B.R.