the talent you would be looking for is stench ( decreases world attitude by 25 but melee opponents will find you less attractive in combat)
Yea that is the talent I assume would decrease aggro on a character, I'm talking about one that increases the aggro on a character.
Nothing like that exists.
Also, you can only use Walk In Shadows once per battle (it has a long cooldown).
Unfortunately I learned this yesterday when I made a knew game and messed around with a rogue and a witch build. I'm assuming at higher ranks, actual sneak can be re-initiated during battle.
Edit:If you have high dexterity, the cooldown will be reduced. Whysper is right, only int has this behaviour.
Walk in Shadows is only used for 3 things:
Stealing stuff.
Getting a better position before the battle.
Escaping attacks when you're in the middle of battle (And if you are, in my opinion, you are playing rogue wrong).
Sneaking is powerful together with Guerrilla, test it out on one hireable henchman before starting a playthrough which focuses on it.
Edit:
And no, unfortunately there is nothing that increases enemy interest in you inherently, this is not one of the main mechanics of this game.
HOWEVER, enemies tend to attack characters that have lots of buffs (Put fortify and oath on Madora and see who they will attack ;D).
I have never noticed that ai attacked the highest buffed character. I usually have Madora buffed with a multitude of thingd (haste, oath, rage, power stance, magical armor, ect) but I thought they would focus her because she stayed in their face.