Krystal is a female native fox of Cerinia, a planet outside the Lylat System. Krystal became proficient in using a powerful staff weapon, as well as her natural abilities of telepathy.
Cerinia was reported to be completely destroyed in an unknown disaster in which both of Krystal's parents died. It was hinted that Andross, who at this time was a disembodied spirit, was the one responsible. Krystal, seeking answers concerning her home planet's destruction, journeyed to the Lylat System, where she came to Sauria after receiving a distress call during her search
Upon arriving at Sauria, the source of the signal, Krystal immediately learned of the troubles of the planet's natives, and their peril at the hands of General Scales and his SharpClaw army. General Scales had attacked the Krazoa Palace and caused the six Krazoa Spirits to flee from their sanctuary. The Krazoa spirits scattered all over the planet, and began to die. At the same time, the planet itself began to break apart, poised to explode.
In an effort to turn the tide of war and undo the damage Scales wrought, the young vixen agreed to help the Saurians return the six Krazoa Spirits to the Krazoa Palace and save Sauria from destruction. However, Krystal only fared as far as retrieving the first Krazoa spirit from the bowels of the temple. Upon releasing the spirit into the temple's interior, she was attacked by Andross, who imprisoned her in a crystalline cell at the top of the palace. Krystal would remain there until all of the Krazoa Spirits were reunited.
Krystal's life-force began to be drained by the crystal, until Fox McCloud of the Star Fox Team arrived to save the planet. Fox first contacted Krystal via her staff, which he retrieved from the ground after Krystal lost it while in mid-air combat with Scales' galleon after her arrival. Krystal had left telepathic instructions on how to use it, and Fox soon learned how to use it to aid in his mission. Fox was directly contacted by Krystal when he heard the echoes of her telepathic cries for help in Saurian language, with the Krazoa Spirit Krystal released imploring Fox to save her.
After the Krazoa Spirits were returned to the palace, Krystal was freed from her incarceration, only to quickly brush Fox aside to take the staff from him. It was at this time Andross revealed himself, having used the energies of the Krazoa, Krystal herself and Cerinia (which he possibly destroyed) to revive himself. Krystal attempted to shoot Andross down with her staff (which she forcefully and coldly took back from Fox) as he departed to conquer the Lylat System (presumably in an attempt to avenge Cerenia), but it proved ineffective, and Fox journeyed into space in his Arwing to defeat his arch-nemesis once again.
In the aftermath that followed, Krystal regretted her cold demeanor towards Fox, and sought to apologize to him for her actions and thank him for all of his help. Krystal initially sent a message for this, but docked with the Great Fox and thanked Fox and his assembled team in person. Fox, however, was too shy around her to respond. ROB 64 unintentionally revealed Fox was infatuated with Krystal, who appeared to reciprocate. Afterward, Fox and Krystal would begin building a relationship.
Krystal fought bravely in the Invasion and played an important role.
During their trek to Fortuna after Oikonny retreated from the space battle to the planet, she managed to warn the rest of the team that Oikonny's forces are preparing an ambush when they arrived at his base. After team Star Fox skirmished with a strange creature on Fortuna during a rebellion started by Oikonny (an encounter that almost resulted in her death due to the creature firing a blast at her ship and hitting it), they discovered that the creature was an Aparoid, whose species was to invade the Lylat system, and that the Aparoids had recently attacked Katina.
The team were dispatched there, while Krystal tried to assist Fox, but was rejected and ordered with the rest of the team to fly in Arwings covering him. Krystal ran into trouble over the planet, but was rescued by Fox. An Aparoid Walker attacked McCloud, and it was Krystal who pointed out its weakness. Krystal accompanied Fox to Sargasso, where the Walker's core memory was taken by Pigma Dengar. She and Falco were tasked with destroying enemy fightercraft.
Sargasso Space Zone and FichinaEdit
When Star Wolf arrived at their location, Fox rescued Krystal several fighters. After Fox shoots down the rival team, they discovered that Pigma was on Fichina. Fox destroyed generators hindering the planet's climate control core and Krystal and Slippy backed Fox up. Afterwards, Pigma made an appearance, and turned the main Power Generator into an Aparoid. Fox destroyed it and saved Fichina.
Meteo Asteroid BeltEdit
At the Meteo Asteroid Belt, Star Wolf seemed to have been destroyed, but Krystal's senses told her that they had abandoned ship. A horde of Aparoids attacked, and Krystal was tracked by enemy fighters. Fox destroyed them, and Krystal rewarded him. After getting out of the base that they had infiltrated, Krystal noticed Pigma Dengar's ship drifting in space. Pigma and his base merged and became an Aparoid. The Core Memory was confiscated by the team, and Pigma was destroyed.
After sending the Core Memory to General Pepper, Krystal interrupted his briefing to the team by highlighting a distress signal coming from Sauria. Krystal and Fox were sent in to fight on foot, while Falco and Slippy took to the skies. Krystal was formidable during the fight, and cleared an entire temple of Aparoids.
Celebrations were brief, as the team received a distress call from Corneria, which had been overrun by the Aparoids.
The entire Star Fox and Star Wolf teams fought Aparoids at the Orbital Gate to defend it so it could send them to Aparoid City while Beltino Toad finished work on a selfdestruct program that will destroy the enemy. Krystal and Slippy were attacked, but managed to avail themselves. After defending the gate from Aparoid missiles, Star Fox journeyed to the Aparoid City. Krystal and Fox, abcked up by air cover, destroyed the Aparoid's reproductive units, and eventually deactivated the shield protecting the city. It reactivated before Star Fox could enter, forcing Peppy and ROB to crash the Great Fox into the shield, leaving Krystal and the team with the assumption that Peppy and ROB were killed. The Aparoid Queen attacked its assailants, but Fox, Falco, Krystal, and Slippy defeated her, causing the Toad selfdestruct program to work, destroying the queen and all Aparoids present. Fox and the team were able to make it out of the homeworld before it exploded. Seconds after Krystal mentioned Peppy and Star Wolf's sacrifices, Peppy and R.O.B. made contact, having survived the crash into the shield.
In the events following the Aparoid Invasion, Fox had a growing concern for Krystal's safety and had her discharged from the team, which caused Krystal to adopt a bitter temperament. Heartbroken and ashamed, she left and was not heard from again for some time.
Anglar Emperor PathEdit
While she is a part of the Star Wolf team, it appears that she has begun a relationship with Panther. Fox learns this from Falco, who tells him that Krystal was with Star Wolf. Fox decides to track her down. He finds her at Sector Z, which is overrun with Anglars, but they defeat them all, with the help of Krystal. Fox apologizes, to which Krystal merely complies. She tells Fox that she and Star Wolf have defeated the base at Venom, but Anglar and the remains of his army escaped to the Asteroid Belt. She helps in the battle at the Asteroid Belt against Emperor Anglar. They kill him, along with his remianing forces, and are once again saviors of Lylat. Star Wolf sends a message, with Panther mentioning Krystal, how he is upset. Krystal realizes this, and months later, she leaves Fox, and rejoins Star Wolf, to Fox's horror and Panther's joy.
Fox and Krystal PathEdit
After Krystal disappeared, Fox and the team haven't heard from her. Thats when Fox decides to track her down. He finds her on Katina, and urges her to join, but Krystal rudely insults him, revealing that she is part of Star Wolf. Nonetheless, Fox helps defeat the Anglars on the Planet. After the battle, Fox doesn't give up, and tries to get her back, but Krystal is still acting nasty to him. She does consider this though, and says for him to apologize, then she'll think about it. Fox does, and despite Panthers protests, she joins. They meet up with the rest of the team, and to their surprise Krystal has changed. She tells Fox how to get to Venom. Andross had created a device to neutralize the Venom sea, and hid it on Titania. They go there and defeat the bioweapon guarding it, and head to Venom. On the way, Slippy is somehow able to get through to Krystal that Fox and her are meant to be together. At Venom, they kill the Anglar Emperor, and emerge victorious. Fox convinces Krystal to join, and that they are meant for each other. Team Star Fox is together again, with the new addition of Amanda, Slippy's fiancee.
Goodbye Fox pathEdit
After team Star Fox defeated the Anglars, they go their separate ways. Fox finds Krystal on Sauria and she forgives him, got married, and have a son named Marcus, who will be the future leader of Star Fox someday.
Star Wolf returns pathEdit
After Fox finds Krystal on Katina, he tries to make her return, but to no avail. They rendezvous with Wolf, who found the device that neutralizes the Venomian sea. They head there, and defeat the Anglars. Star Wolf are recognized as heroes now, but people are calling Krystal a traitor. Krystal ultimately becomes a bounty Hunter, and changes her name to Kursed. On cue, she and Fox cross path, but he hardly recognizes her now.
Lucy and Krystal PathEdit
Lucy Hare is on Corneria, trying to liberate the Planet from Anglars. There, she meets Krystal, Amanda, and Katt, who agree to help. They defeat the garrison, and the Splitter. They then get the news that Star Fox has defeated Emperor Anglar. Krystal is ready to forgive Fox, and when he and the team comes, she rejoins Star Fox, and forgives Fox.
How Krystal winds up after Command remains a mystery. In most of the game's endings, she reunites with Fox and once again rejoins the Star Fox team. However in some endings, she instead chooses to remain with Panther and the rest of Star Wolf or, in the default ending's case, she initially joins the Star Fox team, but then ends up leaving and joining Star Wolf later. In one of the game's endings she is unable to live up to the choices she made in the past, and takes on a new life as a bounty hunter named Kursed. Alternatively, in another ending, she and Fox both leave the team to live a new life together.