AroOfficial

Aro normally carries himself in a cheery disposition and has shown to be polite to the point of being at complete ease even in the most objectionable of situations. Beneath this facade of optimistic giddiness, he is power-hungry and highly manipulative. He finds Bella Swan's immunity to mental powers, including Jane's "pain" power, intriguing. Though he has never wanted anything more than Alice's power. After Bella becomes a vampire, he twice invites her to join the Volturi Guard, which she refuses both times. This upsets and surprises Aro, but does not infuriate him. 

He holds power over everything and is willing to go to any length to secure his status, even if it means killing, as it happened with his sister Didyme to keep Marcus in the Volturi. As he states in New Moon, he sees himself and his kind as soulless monsters. This is one of the reasons he is so intrigued and touched by Carlisle, being the first vampire who is not, which gives him hope. Aro is also genuinely and deeply touched by Bella's love for Edward; whether he knows it or not, love is the thing he most wants. It is however unlikely he will receive it as long as he abuses his power.