KAT - Years ago, her partner vanished under mysterious circumstances, but she never gave up searching. Leaving the upper city behind, she now navigates the tunnels and shadowed networks of the underworld - building connections, gathering clues, and chasing answers. Every tunnel brings her closer… or deeper into danger.

NAOKI - Before he disappeared, Naoki had already made a name for himself. He broke into systems no one else could reach, then vanished beneath Block-07 before anyone could silence him.

ZED - He was once part of a research program studying magnetic zones and space exploration. Now living off-grid among refugee communities in the old city ruins, he relies on his ingenuity to survive. His custom jetpack was patched and modified countless times but still works, and his magnetic boots let him traverse the ruined landscapes and scraplands.

ROBOT HOST [NAOKI] & KOI - A discarded worker robot carrying the consciousness of Naoki, a legendary hacker, now struggling to survive in a failing mechanical body. Alongside him is Koi, a loyal companion sent by Kat to guide and assist him on his journey through the wastelands toward Block-07.