She costs 4! 4!!! :D Pretty expensive , obviously. Ok lets be honest she is a great tank and great stat booster especially if you are Silas who likes to control board and kill stuff when he find his weapons. In fact he is great with this card's campaign since you dont want to kill enemies with vengence if possible. He can use her to greatest extend outside of her campaign she will allways give you +1 agilty since vengence is a unique mechanic but you will get +2 str anytime
Now you may be thinking "what if there isnt a victory point card in scernio" It is rare but that happens but good thing is when that happens most of the time enemies are easy, mostly cultists or some lowly ghouls. So she is helping you most at times that you need most But her abilty is not just her horror soak its just minor boost. Her stat boost is amazing as long as you use both agilty and str but If you dont... I guess it depends then. She becomes very "meh" if you dont use agilty too and you should never pick this if you dont use STR because you will miss most of her boost then(she cant heal horror without killing and vengence is only exists at 1 campaign) I think any rogues that can use weapons is very good with her still. She is still very expensive so watch your economy.
In short:She is an ally that says "I will help you to control board , either to kill or exhaust
Edit:After thinking for a while she is also an interesting choice for characters that cant access to str boost like seekers with strange solution. 1 of biggest problem with strange solution is 6 str without any skill boost tend to miss a lot so it might be a problem but Ichtaca is a good solution to that . Someting you might consider.