Yes the big guy is a mecha

 

Name: Kum Haehyun, Kum Jonryoku, The Tuner
Origin: Guilty Gear
Gender: Female, Jonryoku has the appearance of male
Classification: Human, Mecha
Age: Unknown
Powers and Abilities: Super strength, speed, durability, agility, endurance, skilled hand-to-hand fighter, can use ki for different abilities such as fire manipulation, healing and deterioration of a target's body
Weaknesses: None notable
Destructive Capacity: Large star level+ (fought Johnny in his character episode)
Range: Several meters
Speed: Massively FTL+ (can keep up with Johnny)
Durability: Large star level+
Lifting Strength: At least Class G+, likely higher
Striking Strength:
Class XTJ+ (can trade blows with Johnny)
Stamina: Superhuman
Standard Equipment: Nothing notable
Intelligence: Skilled fighter, is a master in ki manipulation and is currently helping developing a cure for the Japanese Colonies illness, Haehyun might just be one of Guilty Gear-verses greatest minds
Notable Attacks/Techniques:

- Tuning: A special ability only a Tuner has. They can either heal or break down one's body by manipulating their ki infrastructure, similar to Ichiryuu's Minority World but not quite as strong. Haehyun can beak down a target's body to the point where all she needs is a simple flick to defeat them.

Notable OBD Victories:

Notable OBD Losses:

Other: