Captain Retsu Unohana is the Captain of Squad 4. She is a soft-spoken woman who has never displayed distress and uses honorifics when addressing everyone, including her subordinates. Shunsui Kyōraku and Jūshirō Ukitake treat her as their senior, implying she may have been involved in Soul Society longer than either of them. As the head of the 4th Division, Unohana is usually tasked with healing others, commonly treating the most severe injuries. Though she is always polite to her patients, her presence will scare her charges into submission if they try to leave her care before they are fully healed. She has also politely intimidated two squad eleven members in the Rukia Rescue arc and Shunsui and Ukitake appeared nervous when she overheard them discussing her possible age in the gaiden arc.