For those curious, in the novel Jin- Woo couldn't hear what Baran said to Osborne because it sounded like gibberish to him....
but if you want the spoiler...
He told him that he and The beast Monarch (The huge wolf) were sent by the leader of the Monarchs, the Dragon Monarch Antares, because he wanted to kill Osborne and absorb his powers to become the most powerful existence
@HorseRider9000 Baran was the Demon King from the underworld, Jin-Woo fought him on the 100th floor during the Demon Castle arc. As for the wingdings, I have no idea.
Why the heck did they put wingding in it? At least put some gibberish, or even censored thing to make it unreadable. Wingdings just ruin the whole tension dammit