Whenever Lion uses his ability, Vigil can hide behind his cloak to move around freely without being detected. This means no red dot for the opponent, and you'll be able to get the jump on those rushing around.

What is vigils special ability?

UNIQUE ABILITIES AND PLAYSTYLE

Chul Kyung's quiet lethality in the field allows him to rely on his Electronic Rendering Cloak (ERC-7) to remain undetected. ... Vigil carries a prototype in his backpack, which scans surrounding electronic devices and wipes his image from any cameras in view.

How does vigils gadget work?

Gadget: Electronic Rendering Cloak (ERC-7)

When active, Vigil's cloak allows him to automatically scrub his image from any video monitoring device, such as drones and cameras. When hidden from a drone, the colors of the lights shown on it will change to white.