Soooo... based solely on the summary.
The kid is basically a passive Pay-to-win character. Or more precisely, the type of game where there's a VIP system and each cash purchase gets you VIP points to get stronger passives and bonuses.
Which begs to question if it's per transaction, or based on how much money is spent. And we already have confirmation that the passive buff is dependent on him being in the party.
And based on the preview panel, it appears that this RPG world is far more gear oriented than it is skill or level oriented? Well, we'll find out I guess.
Pretty damn box standard trash, kinda silly while trying to take itself seriously, we'll see how stupid this goes.
...
So... I was about to say take your bet on the first companion, but the cover kinda spoils it. Seems like a human knight-type girl, again very box standard for this sort of stuff.
So instead, let's take bets on the second companion.
Erofu? Catgirl? Loli?
Maybe a combination of the above, like a Loli Catgirl?
Actually to make it more fair, let's go with Beastkin, sometimes these authors like to spice it up by having a different animal base.
And will it be a slave, yes or no?
Will there even be a harem to begin with? I mean we don't have a harem tag (Yet).