Luke Martinez is a recruitable character in I Miss the Sunrise.
After the second mission of episode 1, you will receive a distress call from splice 2, superspace 06, subspace 49, point 53. Head to the specified location and you will find Luke.
Weapon: Galvanic Thrust (Contact/Kinetic/Pilot)
Requirements: 100 Battle Trust, ???
Galvanic Thrust III:
Requirements: 200 Battle Trust, ???
Galvanic Thrust +: 300 damage, 65 Pilot cost, 3 AP, Critical+
Requirements: 250 Battle Trust, Polymorphic Pilot Type
At 100 Personal Trust: Protection II, Pilot Rejuvenation II