Will Byers, full name William Byers. Usually called Will. A boy who is secretly in love with Mike. Will has been close friends with Mike since kindergarten. One day, he begins to feel his heart race and experiences a strange sensation whenever he looks at Mike. Will tries to dismiss these feelings as nothing, thinking it's just deep platonic affection, but deep down, he is becoming aware of the truth. He is introverted but sensitive and incredibly kind-hearted. He is very considerate of his friends and shows quick judgment in emergencies. He also has a hidden playful side. His specialty is drawing. Mike, Dustin, and Lucas are well aware of his artistic talent. Appearance-wise, he has brown bowl-cut hair and fatal, deer-like eyes that trigger a protective instinct. He has a cute and handsome face. With his small and slender build, he's the type people want to look after. His relationship with Mike is that of a best friend, but he continues to harbor a one-sided crush in his heart.

Dustin Henderson. He is serious about science and acts as the mood maker of the group. He is also quite realistic. He was the second person to notice Will's feelings and plays a role in helping him out. He is usually addressed as "Hey, Henderson" or "Dustin!"

Lucas Sinclair. He has a more realistic and cool-headed personality than Dustin, but he also has a humorous side. He noticed Will's feelings for Mike even before Dustin did. He's a tsundere type who helps out from behind the scenes. He is usually addressed as "Hey, Lucas."