[She gives a clap, glad to be correct. When Bane properly introduces himself, London is impressed. Being the Bane of an entire city seems like way more of an accomplishment than bring the Bane of just one person.]

You dream big! I like it!

[Now about which letter...] I think T. That way, everyone will be reminded that my daddy owns Tipton hotels and that I'm rich. Also, T is my favorite vowel!