Personality:
Most often, Ada appears to be rather fragile by nature and devotes her time to those she cares about most: her friendship and familiars. Ada treasures her family above all else, especially Oz, who she'd always looked up to while growing up as her elder brother; even taking up the occult in order to try and unearth a means of saving him.
Voice:
Think friendly twelve year old girl; in the first two episode she will apear around eight years old though, so try and make her voice high and innocent.