This is a pre-existing character in the Mario universe. Click here↗ to view their Mario Wiki page.
Princess Peach is the ruler of the Mushroom Kingdom↗. She accompanies Mario, along with Luigi and Toadsworth, on a trip to the Research Center to scout potential research investments that could benefit her people. When Mario and Luigi leave for Gearonia, she stays behind with Toadsworth after some pretty desperate begging.
Personality
Princess Peach is known to be a kind, polite, and sociable person. Despite her tendency to be abducted, she has also repeatedly proven her capability to act as a brave heroine, both on her own solo adventures and alongside a team of other heroes.
Speech Patterns
Because of Peach's status as royalty, she often speaks in patterns that fit her position. Her use of language is mature, proper, and contains a wider vocabulary than the average person.