In the OVA, she seems to have given up on beauty and her fashionista ways, and acts much like an 'old woman'. However, due to all of her reading, she appears very smart, even designing a giant robot for battle.
In the context of the OVA, it is evident that she has relinquished her focus on physical attractiveness and her glamorous persona, adopting a more mature and elderly-like behavior. Nevertheless, her extensive reading habits have granted her exceptional intelligence, which she demonstrates by designing a massive robot for combat.