Gurio Umino: The nerdy classmate of Usagi. He did have a crush on her briefly but he eventually realizes that she will never like him back so instead he fell in love with Naru, Usagi’s best friend. Umino does have a streak of braveness when it comes to Naru being in danger which is fairly often…

Furuhata Motoki: Motoki is the blonde guy who works at the Crown Game center. He was like the first person that Usagi had a crush on. He makes appearances in like every season except for the Sailor Star I think. Makoto also had a crush on him, as did Minako and Ami in the manga...Motoki is also Mamoru's friend and Unazuki-chan's older brother.

Ail: Usagi managed to attract the eye of Ail in the R series. Unfortunately for Ail, both Usagi and Ann were busy hanging all over Mamoru. Ail eventually realizes that Usagi well never be his and that his true love was actually Ann.

Prince Demando: Demando was the leader of the Black Moon Clan and was obsessed with Neo-Queen Serenity in the future. He figures out that Sailormoon will be Neo-Queen in the future and he tries to brainwash her into loving him but she stubbornly resists him and clings to Mamoru. Demando’s love for Usagi caused him to be killed by the Wiseman. In the manga, Usagi and Mamoru destroyed Demando together.

Seiya: Poor Seiya. He spent the entire Sailor Star series pining after Usagi, but she never realized his affection for her and still clung to Mamoru. They went out on a date once and Usagi never realized it, she just thought she was hanging with a good friend. At the end of the series, Seiya had to leave with his Princess and Mamoru returned to Usagi’s side. I hafta say that if Mamoru wasn’t there, Seiya would have been the perfect match for Usagi.