Juvia Lockser vs. Keyes

Juvia Lockser vs. Keith is a fight fought between Fairy Tail Mage Juvia Lockser and Tartarus Nine Demon Gate Keith.

Prologue
Following Lucy's victory over Jackal, Gajeel spares her from the wrath of Torafusa, however, he too is saved, this time from Keith by Juvia. Just then, as Silver appears and threatens to freeze Juvia, Gray too arrives and cancels out his ice with his own, though he is visibly disturbed by the man's physical appearance. Now with no time to react, Tempesta lands at the scene and attacks both Gray and Gajeel with a point-blank breath of flame; Natsu makes his entrance by eating the firestorm and thereby saving his comrades. With the immediate series of threats removed, Natsu states that he hasn't any idea as to what's happening, but that he feels as though Lucy has saved them from something. Now addressing the opponents before them, Natsu calls the line-up of extremely formidable opponents quite hospitable, and the Mages and Demons stare each other down, ready for battle.

However, before anything can begin, after Natsu notes that Tartarus' plan seems to have hit a snag, Gray's unease about Silver's appearance becomes apparent; Natsu explains that he's the one that froze the Sun Village whilst Gajeel, like Natsu earlier, says that Silver's scent is very similar to Gray's own, something which sends Juvia into a tizzy. With that, Silver rushes at Gray and then teleports the two of them to a new location, claiming that Gray is his to fight. With the distractions removed, Tempesta attacks the group with a series of tornadoes; Gajeel remains unaffected because of his iron body and rushes at Tempesta, only to have his attack blocked by Torafusa. Keith, meanwhile, attempts to attack the staggered Gajeel only to be "hit" by Natsu, his body turning into a series of black particles upon contact. Juvia attempts to make good of the situation by attacking Keith with her Water Slicer, but he merely dodges, which causes Gajeel to question the skeletal Demon's abilities, only to be mercilessly struck by Torafusa mere seconds later. As Keith retaliates against Juvia and Natsu calls out the names of his comrades in concern, Tempesta attacks the Fire Dragon Slayer with a powerful thunderbolt. Such attacks, however, do nothing to diminish the hopes of the Fairy Tail Mages and they charge forth, ready to continue the battle.

A short while later, Natsu unsuccessfully tries to attack Keith once more, and the Mages regroup, with Juvia taking on Keith by her lonesome, and Natsu and Gajeel teaming up against Tempesta and Torafusa.

Battle
Juvia attempts to harm the Demon Gate by kicking him, however, he merely turns into Magical Barrier Particles yet again and retaliates by swiping at Juvia with his khakkhara. After being struck, Juvia notes that she has a bad feeling regarding Gray's wellbeing, though mere seconds later, she listens in to Natsu and Gajeel announcing the arrival of Sabertooth's Sting Eucliffe and Rogue Cheney. Keith, not much after, mentions aloud that Gray's story is going to soon come to an end, which greatly angers Juvia; Keith expands his statement, saying that faced with calamity and rage, Gray will make the same choice as his master did before him. Ignoring Juvia's attacks, Keith explains that Silver's power was recognized by the Underworld King and as such, he was justly appointed to the rank of Nine Demon Gate, which causes Juvia to wonder why a Mage who kills Demons would be allowed to join a guild composed of them. Keith ponders the reason as well, offering guesses based around Mard Geer's whim or a deterrent factor for the rest of Tartarus, but ends by saying that regardless, he was recognized by Mard Geer. Perturbed by this news, Juvia continues to extend her concern for Gray.

As she is struck by Keith again, Juvia reflects on Keith's earlier statement regarding Gray's choice and concludes that Keith must be referring to Gray using Iced Shell. Then, as Silver reveals his true nature to Gray, Keith explains that Silver is merely a corpse and that his true nature shall be revealed; Juvia finds the fact that Silver is a corpse to be impossible, but Keith, devilishly smirking, states that his divination always hold true, which prompts Juvia to question what he is. Continuing to fend Keith off, Juvia is soon contacted by Silver via Telepathy, who she correctly identifies as Gray's father. Stating that he doesn't have much time, Silver tells Juvia that she needs to defeat Keith, reassuring her with the fact that as far as the Nine Demon Gates' strength goes, he isn't very strong. Explaining that he's a necromancer, Silver tells Juvia that he's using the chairman's dead body to activate all three thousand Face bombs, and that the only way to stop Face is to defeat Keith. Taking all the information into account, Juvia tells Silver that if she does so, then he'll disappear as well; saying that it is of no consequence, Silver tells her that she must do it for Gray's sake.

As she is hit back, Juvia tries to continue her talk with Silver but finds him to be unreachable and concludes that she doesn't have a choice regarding Keith, but wonders if it's really for Gray's benefit. Keith, meanwhile, states that they all knew that Silver was acting against them, but recognizes his anger as the reason why he was able to stay "alive" the longest out of all of his experimental corpses. Calling Silver a wonderful puppet, Juvia comments that he's disgusting; Keith states that the living son and deceased father will battle each other to the death and create another corpse for him to perfect. Hearing this, Juvia screams that humans aren't his playthings, but Keith responds by saying that, rather, they're his research tools. Angered, Juvia attacks Keith and tells him that humans don't exist to quench his boredom, but Keith dodges and tells her that he'll kill her and use her corpse to kill all of her friends. As she says she won't let him, Keith ensnares her in his body and tells her to kill him, adding that without him, Silver will also disappear. Tormenting her, Keith tells Juvia to sever the bond of father and son, which she tearfully says she can't. Taking glee in her tears, Keith admonishes humans and calls emotions unsightly impedimentary bundles of ego, swallowing Juvia into his Magical Barrier Particle body as he does so.

Citing that he's removed one obstacle, Keith feels a throbbing sensation in his chest, which soon turns into a torrent of water kicking about in his insides. As she flails about, Juvia screams that Keith cannot sever the bonds between humans; Keith curses himself for falling prey to a human's Magic whilst Juvia tells him that Gray and Silver's feelings will reach each other even if they change, as they will always remain in the heart. Bursting out of Keith's body, shattering it into pieces and utterly destroying him, Juvia states that that is what she believes to be the strength of human love.

Aftermath
Bursting into tears, Juvia tells Gray to forgive as her Silver disappears, but as he does so, he thanks her, telling her that his soul has finally found peace. As she tries to apologize for her actions, Silver stops her and tells her to merely look after Gray for him, which she tearfully agrees to doing. After agreeing to Silver's last request, Juvia falls to the ground, having been poisoned by Keith's Magical Barrier Particle body, but is caught by Lucy, who listens to Juvia state that she only wanted to see Gray again. Lucy then tells Juvia that she will, which she affirms before falling unconscious. Then, as Natsu and Gajeel continue to battle Tempesta and Torafusa, Juvia is caught in Torafusa's Tenchi Kaimei and swallows some of the poisonous black water, putting her life in grave danger.