Rosalind was devastated about her mom dying from cancer and promised her father to take care of her younger sisters, Skye Penderwick, Jane Penderwick, and Batty Penderwick. Rosalind acts as a semi-maternal figure to her three younger sisters. Rosalind is the responsible Penderwick. The book portrays her as the prettiest of her sisters, being the eldest, and it also seems like she is the one most affected by her mother's death. Despite being the leader she never comes off as bossy.