Captain Wendy Seager former firefighter / arson investigator / CO of the OFI since 2024 / close friend of cfd's poster boy .ᐟ , 𝑪𝒂𝒕 𝑯𝒂𝒍𝒔𝒕𝒆𝒂𝒅.ᐟ , and 81's girl scout * / co-sponsor of Girls on Fire / ally of Firehouse 51 fc: Andy Allo

thief. art enthusiast. college student. (step) daughter. niece. # 1 lydia sheridan anti. cheshire cat energy. former foster kid. only child. very materialistic. mean pansexual. flynn's fave. more clever than she looks.

Nicholas Amaro aka Nick / CID agent / Army vet / former NYPD detective / hubby of lieutenant amaro / dad of Zara, Jesse, Billie, and Dominic / papa dino vibes / triplet of Scotty and Larry / older brother of three / uncle / ally to the CPD and NCIS fc: Danny Pino

Special Agent May Trudel on a FBI fly team / JTF2 + RCN veteran / ⚓️ * hawksy 's ex fling + baby mama / sailor girl ~ 's mother / didn't actually die in a car crash in 2015 (pulled a Doris) / multilingual / hasn't revealed that she's alive yet fc: AJ Cook

Sara Waincroft chinpedia !? 's niece & ward / grace . . . 🐒 's bestie / loves pandas / enjoys surfing / part of the Five-0 extended ohana / Gabriel's daughter / born in 2012 fc: Ai-Chan Carrier

Officer Kono Kalakaua member of Five-0 / chinpedia !? 's younger cousin / Sara's uncle / recasted / classic canon inspired / retired competitive surfer / knows everyone / former HPD officer / grace . . . 🐒 's uncle figure fc: Ji Chang-wook

Director Myles Graff head of the CISIS Toronto Region office / tpd's sherlock • 's younger half brother / indoor-outdoor cat energy / dad's favourite / golf enthusiast / born in 1981 / reluctant semi-ally of 𝑲𝒆𝒍𝒍𝒆𝒏 𝑨𝒍𝒆𝒙𝒂𝒏𝒅𝒆𝒓 𝑾𝒂𝒓𝒓𝒆𝒏 . fc: Jay Ryan

Detective Kelly Hart mom to Eve / detective in HPD's robbery-homicide unit / McGarrett. 's pseudo sister / established bi / Navy widow / moved to Hawaii in February 2025 / ally to Five-0 / Chase's sister in law fc: Vanessa Ray