|Mosfiqur Rahman Mahin|
|Birthdate||1st October 1991|
|Affiliation||Light Kamen Riders|
|Previous Occupation(s)||Collage Student|
Before becoming Kamen Rider, Mahin was a collage student and best friends with Nasif. The two of them were out for a walk when he witnessed Kamen Rider Phoenix and Cobra fighting. Nasif got scared and ran away, but Mahin stayed and saw another Rider, Advent Master, arrive and Phoenix flee. Wanting to help, Mahin asked what he could do, and Cobra told him about the Ventara, and that they needed Riders to defeat his brother's army.
Kamen Rider: Bat
'Dark Visor: Kamen Rider Bat''s Card Reader (A sword)
Sword Vent:Summons Melee-Weapon Wing Lancer
Trick Vent: Makes four illusionary copies of Wing Knight
Guard Vent: Blackwing turns into a cape which guards Wing Knight
Nasty Vent: Summons Blackwing to give a dark howling sound
Final Vent: Blackwing turns into cape. Wing Knight jumps into the air and spins as he attacks the enemy
Survive Mode: Gives Wing Knight blue armor and darkens his visor, Blackwing turns into Black Raider
Blackwing is Bat's parnther and also his contract monster. When Mahin is in trouble, Blackwing comes to rescue him without being summoned.