Tsuna Arrabane and the Seraphim Syrum

She crouched on the cathedral gargoyle, rainwater slicking her kettle black combat suit. Below, the opulent gala thrummed with oblivious dignitaries, their laughter a discordant melody in the coming storm. They were celebrating the Seraphim Syrum, a fabled vial rumored to grant virtual immortality infusing every cell with nanites that would maintain youth and repair catastrophic damage in moments.

It was a Narciss Corp lie, of course. A lie that fueled war machines, the syrum worked, but didn't last and was highly addictive. The posh glitterati was about to be made into mega rich addict slaves.

Tsuna didn't care about the priviledged few here, but the avalanche of addiction and destruction that would follow the drugs release. She would interrupt the release party. She would destroy the shipment, then the facility.

Her gaze flicked to the armored convoy, spotted their leader, the iron-fisted Minos Rao, a reptilian glint in his cold eyes. She readied her katanas for the drop.