None of Ganondorf's actions reached Midna, for she was on the attack.  Gathering her magics, she created a nebulous cloud of twilight particles around her, which then began to crystallize into little shards that rocketed toward Arrghus at high speed.  Most hit the guardian bubbles at bad angles and dissolved, but several managed to pierce the watery membranes and strike down the bloodshot eyes within.  When three were destroyed, Midna paused to watch the remain dozen or so shift slightly, so as to keep the monster's core eye covered.  Interesting.

The braid beneath her chin glowed brightly before springing out into the shape of a hand.  Concentrating carefully, Midna leveraged her trichomancy to form the hair into a huge mitt that swiped away six Arri at once, though she was forced to reign in the hand shortly after.  Nearby, Zant took advantage of the moment by releasing a hail of hot-pink projectiles that spattered against the beast's main body.  To their annoyance, the bubbles merely zipped back into place after a few moments.  In those few seconds, both missed Vaati's sudden and insidious maneuver.

Midna prepared to unleash her trichomancy a second time, but was abruptly interrupted by the appearance of the hero's demonic doppelganger before her.  An eerily calm look settled across her features as he spoke, his words scabbing and scraping and altogether odious.  She did not yet fear the monster.  As he wasted time trying to provoke her into acting first, she built up a small orb of teal twilight magic behind her hand, keeping it hidden from sight.  When he stopped to summon his shield, Midna shouted out a short phrase in her native tongue.  When Dark Link uttered his one-liner and charged forward, the Twilight Princess was ready.

She hopped back from the dancing blade and threw overhand the twilight ball, which burst on the ground beneath Link's feet.  While she didn't expect that the ensuing blast would have much of an effect on him given its size, she knew it would buy her enough time to escape.  There was no time to be dealing with the small fry when the big fish was just outside her grasp.  As such, when she floated backward, her body dissolved into particles, and through them barreled forth the masked form of Zant.  Zant released a contemptuous laugh and engaged the foe.  

While Dark Link's slashes were powerful and deadly-quick, they contained little consciousness, and so Zant held one of his scimitars back-handed to guard against them while he aimed an overhead cut at Dark Link's head.  He knew that the demon's longsword would be capable of thrusting, which was a capability his own scimitars didn't really share, and one that he -with no shield for defense- would be vulnerable to as well.  He suspected his longer blades and ranged attacks would be able to keep his foe from getting close enough.  As these thoughts rushed through his head, they were accompanied by a sort of chaos—before long, he would not be lucid enough to fight coherently, so he had better use his wits while he could.

Midna, meanwhile, had teleported onto a nearby roof.  Now she was at eye-level, so to speak, with Arrghus.  The sound of music, however, made her pause.  The fairy's song burrowed into her heart, and she collapsed into a sitting position, entranced.  Each note held within it a hint of hurt, a tone of sadness, and above all the pang of loneliness.  It was all Midna could do to keep herself from shedding a tear.  Everything else in the plaza, except for the wild duel between Dark Link and Zant, had also stopped.

Then it was over.  Midna breathed in slowly, her eyes shut.  She had not lost sight of her goal, but her anger was gone.  She was aware of the fairy calling for Link, but paid it no mind.  At this moment, she was the hero.

She summoned a new weapon.  It was like the spear, but larger, and with three tips rather than one.  For a moment she hefted the trident, making sure her throw would connect with the dazed monster, and then she heaved it with all her might.  Despite that, the spear was slow-moving, and there was a small chance that a skilled individual could obstruct its flight.