Sienna is the Ultimate Marine Biologist. She's easily irritable, having a lot of trouble getting along with anyone or dealing with stressful situations. Despite this, she cares a lot about the people close to her, even if she's not always as good at showing it.

She has a female voice with a medium pitch. She often sounds irritated or angry, although she's more relaxed when the situation isn't as tense.

An Australian accent would be appreciated, but it isn't required.