B90 Gickant (Ｂ９０ギカント) is the second boss from Aleste 2.
The B90 is a giant bomber plane. You actually fight it twice, first as a midboss halfway through the stage, then again at the end of the stage, where it is infected with the mutant Vegant plants.
It uses the same pattern in both fights, with the lower engines shooting a large bullet spread while the wing engines shoot destructible homing missiles. Once all engines are taken down the cockpit will become vulnerable and start shooting, using the same bullet spread as well as scattering other bullets.