She has slightly worse health/mana/strength/speed growths than a standard Brute, with higher magic/lust growths, perhaps due to her mixed heritage. Her amphibic movement sure seems like it comes from her Lizard Girl genes.
Trades weapon slot for a second armor slot making her a powerful tanker, but she's no slouch in offense with slashing cleave attacks. She also has DefenseBreak and Push on attack, giving her extra utility in battle.
She has an event that unlocks CGs in the gallery and gives her Collector trait if you raise her "Hands" sex skill to Master.
Perhaps her weapon is the sword in her portrait's background, which might be why you can't equip a weapon on her.