Tendo, Kasumi
From Multiversal Omnipedia
The oldest daughter of Soun Tendo, Kasumi can be described as an island of calm in the chaos that surrounds her (especially since Ranma Saotome and Genma Saotome arrived in her home). She maintains the tendo household, having taken over the job when her mother died suddenly ten years ago.
Kasumi has two sisters, Nabiki and Akane. Doctor Tofu Ono has had a major crush on her for many years.