Your youngest daughter, and a firebrand. Where other Dukes have daughters of a polite, demure- or at least respectful- nature, your daughter seems bound and determined to give you an aneurysm. She has trained with General Alfred of Leicheberg, and has picked up a few tricks from him.
Traits:
Strong: She has the same strength as her brothers. (+3 Martial, +1 Diplomacy)
Young: She has not reached the age of maturity, and as such does not have even that slight maturity. (-2 All stats for every year under age of majority)
Brave: Cowards die a thousand times, the brave but once. (+2 Martial)
Strategist: She has a calm, cool, calculated approach to war. (+2 Martial, +1 Stewardship)
Stubborn: She will break before she bends. (+1 Stewardship, -1 Diplomacy)
Stats:
Martial: 17+3+2+2-4=20- She has already earned some renown putting to sword various vampiric halls; none too impressive, but every journey must start somewhere.
Piety: 14-4=10- She has much respect for any goddess that calls for adventure, and doing.
Diplomacy: 18+1-4-1=14- Like you said, she'll break before she bends.
Intrigue: 17-4=13- All you're saying is, there's a reason her siblings ran to her when they needed something pilfered.
Learning: 5-4=1- She's not particularly book-y.
Stewardship: 9-4+1=6- Whatever in skill she lacks, she makes up for in sheer determination.
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Please note that, being as she hasn't actually finished fully her education, the bonuses to her base stats haven't been applied yet.