Serena is the ultimate tour guide, she has traveled and has given tours in over a hundred countries. She’s a sweet and calm girl always trying to act rationally. She knows and loves a lot of aspects of other countries' cultures, from their food to their history. It’s easy to like Serena, she has a soothing personality and manages to get along with everyone. Despite her friendly demeanor, she has a difficult time trusting others and avoids making deep connections.

Serena has a light, soft, high pitched voice, I think she would sound most like Celestia Ludenberg from Danganronpa just without the accent. Here's an exemple : https://www.youtube.com/watch?v=nDon3ksFYis&pp=ygUYY2VsZXN0aWEgbHVkZW5iZXJnIHZvaWNl