She is recruitable at the King's Tomb.
Liz has decent statuses for her specialities, Bows and Guns, namely her Dexterity(20) and Speed(19).
She is very fragile, spotting only 14 Strength, Magic and Stamina.
Her cosplay item, the Light Rifle makes her an powerhouse with those weapons, as it ramps her Dexterity and Speed by 5 points. And it makes her Magic a little decent, 17.
Recruit Liz early if you are in need of a Bow or Gun user, she won't disappoint you.