Aww, was Jean talking to himself? He couldn't help but laugh a bit as he imagined the prospect of something like that. Until he read the last entry which was so hateful it hurt his eyes. It went something like this.
Asshole! Fucker! Shitheadbastardwhoreslut! Just fly into the stupid sun already so I don't have to shove a cactus the size of a wrecking ball through your ass! Just die! Screw you-
Marco couldn't bear to read more. Instead, he decided to write something.
Jean's just kidding! Anyway, I'm Marco. Hope you're not bothered, perhaps Jean was just annoyed because you called him Jaeger. As you can see in the previous writings, he really hates Eren. Whoever you are, sorry!
He smiled to himself and closed the journal, shoving it back under the pillow.