Valentine
Prowler- Level 40 - Dark
Empire
Att 5 Dmg 4 Def 8 Arm 2 LP 12 Res 9 Speed 8/12 AP 3/4 (?)
Innate Abilities: Ranged Attack (16 In.), Infiltration.
Information: At the beginning of the game you can force an enemy unit to reveal its Advantage Cards.
Surprise Shot: The turn Valentina comes out from Infiltration her Ranged Attacks cannot be intercepted.
OO - Stealth (Subterfuge, Effect)
Valentine becomes Hidden. Upkeep: O
O - In My Sights (Subterfuge, Effect, Reactive)
Activate this ability during the Upkeep Phase and choose an enemy unit to which Valentine has Line of Sight. Until end of turn, if said unit declares any type of Movement, Valentine can make a free Ranged Attack against it before it moves.
OOO - Perfect Shot (Subterfuge, Ranged Attack)
Ranged (12 In.) +5 Attack / -2 Armor. If the target is less than 10 Cm (4 In.) away from Valentine, this attack obtains an additional +4 damage. This attack can only be used if Valentine is Hidden.
OOO - Execution (Subterfuge, Ranged Attack)
Ranged (16 In.). Throw two dice and keep the highest roll. If this attack deals damage, it causes Slow Lv 3. Effect 16.
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Cleaned it up a bit for your planeswalker.

As for my thoughts, I rather like her. She is cheap with a solid set of abilities, she brings some interesting tactical options to the field with In My Sights and Perfect Shot. The former can make people hesitant to charge, and the latter can do some incredible damage at close range. Execution is great for when everyone is stuck in, a level 3 Slow is nothing to scoff at.
Infiltration is also rather nice, especially on an Empire character.
Will have to take some time later and think of a list to fit her in.