@Daisuke Mizugawa On the page 1618 the artist shared a link of monster smash database, with a bio of every character appeared so far http://monstersmash.thecomicseries.com/comics/1622
I see some pages that are not on the website of the comic, perhaps you are a patreon member? In any case, that means there are some on the chapter 1 to 3 as well?