Haven Trooper Yukina "Silver Heart" Yuzuki

Certain athletic female soldiers of Liquid Ocelot's private military were equipped with suits that enhanced their physical capabilities beyond that of a normal human, allowing them to cling to walls and leap several feet into the air. The vaguely green colouring of the suit, along with its distinctive abilities, is the reason the Haven Troopers were nicknamed "FROGS" or "Frog Soldiers".

The skintight grey jumpsuit was adorned with several pieces of leather-like strips on its shoulders and frontal torso. Multiple beige harnesses, straps, and holsters were also wrapped around each Haven Trooper. Their gloves and boots had a mechanism that allowed the wearer to adhere to and scale walls, which was speculated to employ van der Waals force. The boots also had small claws on the toes. All of this gear was topped with a vaguely skull-like helmet with red glowing eyes.

SOP and the nanomachines within their bodies allowed only a minimal psychological deviation from baseline values, meaning that these units felt essentially no emotion in combat. Upon their death, those internal nanomachines would combust, leaving them fully carbonised within seconds by bursting into blue flame. Their bodysuits will "petrify", turning into a stone-like colour before dissipating, revealing their bodies underneath. Their bodies remain unharmed, though, their faces looking peaceful like after a good night's sleep.

The Haven Troopers' characteristic heightened jumping ability and use of a catapult to launch themselves into the atmosphere and effect a dynamic entry earned them their nickname of "FROGS". They also possessed the ability to cling onto walls, allowing them to gain leverage over targets in urban environments, the mechanism of which was speculated to employ van der Waals force.

SOP and the nanomachines within their bodies allowed only a minimal psychological deviation from baseline values, meaning that these units felt essentially no emotion in combat. Upon their death, those internal nanomachines would combust, leaving them fully carbonised within seconds by bursting into blue flame. However, their nanomachines still retained some functionality after death.

Similar to other PMC soldiers, they also had their emotions suppressed via SOP, although to a far greater degree. However, they are still capable of feeling trace amounts of fear, namely when being held up or having a gun pointed to their face.

The Haven Troopers were mostly armed with the FN P90, a Belgian-made personal defence weapon system, to combat enemies from short to medium ranges. The 5.7mm rounds used in the P90 have high velocity and low impact, while they have low shock and lack the stopping power of other rounds such as the .45 ACP used by the Mk. 23 and Operator; they have the capability of perforating lightweight soft body armour even from significant distances.

As their sidearm, the Haven Troopers used the Five-seven 5.7mm pistol. It uses the same ammunition as the P90, benefiting from its accuracy and armour-piercing capabilities despite being a handgun. For Close Quarters Combat, they used a short machete that was holstered in their right thigh plate carrier.

Yukina is 32 years old, born in June 10th, 1989, the nanomachines in her body stopping her from ageing and making her look 20. Yukina has long, silver-white hair that cascades past her shoulders in sleek, straight strands. Her eyes are pale silver. Yukina has a lean but athletic body underneath her Haven Trooper bodysuit.

Yukina was born in Nagano Prefecture, Japan, deep in the mountainous countryside where winters are harsh and communities are small. She and her younger brother grew up in a traditional, quiet household, surrounded by forests, rice paddies, and shrines that had stood for centuries. The rural life instilled discipline in her — early mornings tending to crops, long walks through the woods, and a quiet bond with nature. Her childhood was simple, but also isolated. The lack of modern distractions made her reflective, withdrawn, and observant. Yukina became a hardworking yet kind girl due to her unique upbringing.

Her brother was the closest person in her life, and she was extremely protective of him. She took on the role of caretaker early on, developing a strong sense of responsibility and loyalty. She and her brother would often talk everyday, Yukina often reminding him of farm duty and lecturing him about hard work.

When Yukina is 20, without warning, Yukina’s village was hit by a sudden, brutal skirmish. To her, it was chaos without explanation. Armoured vehicles suddenly drove by, tearing through dirt roads, buildings catching fire, gunfire rattling across once-quiet fields. She couldn’t tell who the aggressors were, government-backed security forces suppressing something? Or terrorists seeking refuge in the rural mountains? To her, it didn’t matter. All she saw was her home torn apart. In the end, she was separated from her brother. One moment they were running together through the smoke, the next he was gone. Lost in the frenzy of soldiers, fire, and screaming civilians. Yukina survived by instinct, ducking into the forests she knew so well. Her endurance and familiarity with the terrain gave her an edge over trained soldiers sweeping the area. But when the dust settled, her village was gone, looted, burned, abandoned with the freshly decaying corpses of her friends, parents, and neighbours. Yukina was overwhelmed with despair and grief, personally making graves for all who had perished that day.

Yukina spent days, possibly weeks living like an animal. She treated her own wounds with makeshift remedies, recalling rural methods taught by her elders. She scavenged what little remained: rice from broken storerooms, water from the mountains, and a hunting knife she had used back home.

A few weeks had passed by as Yukina hid in a now abandoned and burnt shack when she heard footsteps. She closed her eyes as she anticipated a sweep of soldiers, but was instead greeted by the Haven Troopers. The women immediately took the wounded and tired Yukina in to a camp as they questioned her of what happened. When asked if she wanted to join the Haven Troopers, Yukina agreed with little hesitation. After all, she had nowhere to go now, nothing to lose, and maybe a chance to find her brother.

Her adjustment was brutal. She had never touched advanced technology, and suddenly she was thrust into simulations, firearms training, and military drills. At first she fumbled as her rural hands weren’t used to metal and machinery. But her discipline, honed through years of hard living, made her a quick learner. She didn’t complain, didn’t falter, didn’t rebel. She simply endured, as she always had.

Afterwards, Yukina was given a shot of nanomachines, making her look younger in the process. The nanomachines boosted her strength, speed, regeneration and pain tolerance. Yukina's Haven Trooper designation is H-52. Yukina is bisexual.

Her rural upbringing gave her the patience of a hunter, the ability to move silently, and the instinct to use terrain to her advantage.

Outside of battle, Yukina has a big sister personality. Constantly looking after her fellow Haven Troopers, reminding them to stay safe, and raising morale when things got though. This gave her the nickname "Silver Heart." She also has this archetype when dealing with refugees.