I like all of Wendy's voices in all of her appearances, so feel free to take inspiration from any of her voices!

Wendy is shown to be very desiring of wealth and prestige; her being the one of two Koopalings in Mario & Luigi: Superstar Saga to drop 102 coins instead of 99 may be a reference to her greed. The comics and to some extent the DiC cartoons typically portray her as a spoiled brat, and she even thinks of herself as Bowser's favourite child. She does whatever she can to impress her father and likes to be congratulated for her bad deeds. Her personality in the cartoons highlights these traits further, and she is shown to have a very short temper over little things and can be violent when provoked. This latter trait is further confirmed in Mario & Luigi: Paper Jam, though she isn't portrayed as spoiled. After being hit by debris coming from a rock broken by mistake by Roy when fighting the Mario brothers and Paper Mario, she gets angry at Roy and fights him instead of the brothers and Paper Mario[13]. She seems to have a bit of a rivalry with Roy, as she makes some smart remarks at Roy's expense, as evidenced by the opening for Bowser's Minions.