In this scene of the anime, Hiyoko has basically drugged everyone with Teruteru's aphrodisiac soup so all the characters are all hot and bothered and not acting how they normally do. Please refer to the video in the casting call's description for more details.

Mikan's usual shy and timid self is nowhere to be seen while under the effects of the sexy soup. She pounces on Peko the moment she gets to her feet and becomes unusually flirtatious with her. For the first line, Mikan's slightly breathless as she speaks and sounds almost innocent while saying it. For the second line, she drops the innocence and speaks far more seductively.

Mikan should be voiced by a female with a higher range voice. Exact voice impressions aren't at all mandatory, but I do want a voice that stays true to her character.

Voice reference:

https://www.youtube.com/watch?v=5zOsurPMglA