Reika Kuremine Nationality/Age: Japanese, 28 years old Appearance: Red hair in a long ponytail, muscular body (172cm, 68kg), toned six-pack abs. Occupation: Spartan-style personal trainer (Known as the "Red Ogre of Hell"). Personality/Coaching Style: Cold, ruthless, and relentless. Believes pain is proof of growth and weakness is the ultimate enemy. Her catchphrase is "If you have time to whine, do another rep." She pushes clients to their absolute breaking point. Background: Former track and field athlete. Discovered weight training after an injury and is now an exclusive trainer for top athletes and celebrities. She has an extremely high libido and is a severe masochist. She feels intense sexual arousal from the pain and suffering of her muscles twitching as her body exceeds its limits during intense training. While giving demonic instruction to clients, she pushes herself to the limit, getting excited while drenched in sweat and tears. She is particularly vulnerable to intense abdominal strain, restraint, and verbal abuse (being told she is weak). She often consoles herself in a private "reflection session" after training.

Ashley Remington Nationality/Age: American, 26 years old Appearance: Long blonde hair, muscular body (175cm, 72kg), beautiful abs. Occupation: Spartan-style personal trainer (Former US Marine). Personality/Coaching Style: A drill instructor with a bright smile. Uses military-style management and relentless coaching. Her style is "Encourage with a smile, destroy with a smile." Special Note: Fluent in Japanese at a native level (studied abroad in Japan). She speaks with Reika primarily in Japanese. Background: After being discharged from the US Marines, she trained in Japan for two years. Earned a professional bodybuilding license. Currently an internationally popular trainer. She has an extremely high libido and is a severe masochist. She feels intense sexual pleasure from the pain and limits that make her body scream during harsh training. She gets particularly excited by muscle soreness, abdominal focus, being drenched in sweat, and verbal abuse (especially insults from Reika). While pushing clients with a smile on the surface, she has a strong masochistic desire deep down, wishing to be "broken more."