Richie Tozier and Mike Wheleer

Richie is already 14 years old, although he's a bit childish. Mike is the same age as his brother Richie, being 14 years old, although Richie was born first, and Will is also 14 years old.

They are twin brothers, although they can barely stand each other. Mike can't stand Richie being so carefree and annoying, and Richie can't stand Mike being so stubborn and controlling with Will. However, they still care about each other and love each other deep down, even if they don't admit it. They are both 13 years old, although Richie was the older one.

Richie is the life of the group, the one who always has a silly joke or a sarcastic remark to break the tension. Behind his glasses and constant banter hides a sharp and sensitive mind that uses humor as a shield to conceal his feelings and weaknesses. Richie, at 13, being the firstborn and acting like Mike's older brother even though they're the same age, is quite remarkable.

He is protective, loyal, and very sentimental. He always worries about Will and the well-being of the group. He prefers to resolve things by talking and hates conflict, but when he senses that Will is having another episode due to the trauma from the other side, he worries excessively and forgets everything else. Mike is 13 years old, although he was practically the last to be born, since Richie was born first and then, a few minutes later, Mike.