Shii Aasu  

, 我々守思惟

It's not difficult to identify 18-year-old Shii's most notable characteristic - her enormous breasts. She frequently boasts about their weight (each weighing 8000 grams) and has a problem with them in her daily life, often resting them on whatever is convenient. Her family cat was smothered by them. With the arrival of Poemys into the Aasu household, Shii's head becomes her new favorite resting place. She possesses the power of Earth Healing and is named after shi (four), which explains why she is the fourth of the Sisters. In terms of appearance, Shii resembles Hyatt from Excel Saga, and both characters are voiced by the same actresses.