Thermal Ink

The Thermal Ink ability shows the location of opponents to the player for a few seconds after damaging them with their primary weapon. It appears to only show the location of these enemies to the player who damaged them, and the way enemies are located is similar to that of the Sting Ray.

Use
When a player tags an opponent with their main weapon, and has this ability, but does not splat the enemy, then the enemy can be seen by that player, even if the enemy is behind a wall.