Michael "Mike" Hanlon is a major protagonist of the Stephen King multiverse.
Serving as one of the main protagonists of the 1986 horror novel IT, a mentioned character in 11/22/63 (novel) and Dreamcatcher. He is also a minor character in Insomnia.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...
