That's a VB-6 Konig Monster.
Bastard child of a Valkyrie and a Destroid.
Spoiler for mecha:
Batloid mode
Bomber mode
Gerwalk
VB-6 König Monster
Unit type: variable bomber
Manufacturer: Shinnakasu/Northrom Grumman
Empty mass: 101900 kg
Powerplant type: plasma rocket x 4
Armament: railgun x 4, missile launcher x 4, 30mm vulcan anti-aircraft gun x 1
Pilot: Aegis Focker
Mechanical designer: Shoji Kawamori
Bomber/shuttle mode:
Wingspan: 24.42 meters
Overall length: 29.78 meters
Overall height: 6.77 meters
Atmospheric cruising speed at 10000 meters: Mach 1.7+
Maximum atmospheric cruising speed at 30000+ meters: Mach 3.2+