She later returned in a frequent recurring role. Unohana notes that Isane suffers from frequent and recurring nightmares. She had previously appeared in several episodes on a recurring basis. Only regular and recurring characters are included. A major symptom of endometriosis is recurring pelvic pain. The series features a number of recurring character archetypes. Migraines are a type of recurring headache. The series featured a cast of recurring characters. Several former recurring and minor characters make reappearances. The character is recurring and will continue throughout the series. This resulted in an unsuccessful effort to bring back some popular previously recurring characters. There are recurring themes that appear throughout the story. Religion also figures as a recurring theme. An entire stable of recurring characters were seen. The series features a number of recurring themes.