[quote=@Hellion]
RL skill: "Creating several alt skins and inserting code for her avatar in order to disguise/mask her trail within The Universe."
[/quote]

So are they basically hacking The Universe to alter their characters appearance? I'll be honest, I'm wary of any kind of "hacker" character that can start changing things in-game. It's just begging to be abused.

Changing her appearance is something that can just as easily be done via an item of some kind.

Speaking of which...

[quote=@Hellion]
Also, I'm stuck on the "rare item". What would make sense for a relatively non-lethal infiltrator/hacker archetype?
[/quote]

I'm going to assume a hierarchy of Common < Rare < Unique when it comes to things in this game unless stated otherwise.

You could have a "Mystique" skin that lets you copy any non-rare skin you've seen in the past.

Or, a Sombra ability that lets you instantly shut-down any non-unique technology-based item within a certain radius for a few seconds, with a long cooldown. Or just a Sombra glove that lets you shut down one tech-based item at a time for a few seconds with a small cooldown.