An Unruly Summon

The summoning of otherworldly heroes is a dangerous gambit. First, you kidnap someone not just from their home, but their home planet. Then you explain that it's their duty to dig you out of whatever hole the local populace happens to be in, which, if it's the sort of situation that requires a hero, is probably something quite deadly. By this point, the summoned hero already has every excuse to be quite cross.

Oh, did we mention the hero has superpowers? Because the very cross hero has superpowers. Wouldn't be much point in summoning them if they didn't. And they're in the room with you. Have fun with that.

Assuming that you're still upright and unconcussed, the next thing to deal with is that different planets tend to have quite different societal values. You can't just point at someone with fluffy animal ears, claim they're a 'demon lord' and expect the hero to mindlessly slaughter them. Not unless you're very sure the fluffy-eared target is going to attack first. If they start speaking, there's more chance the hero will end up in bed with them than gloating over their corpse.

But if you do get a cooperative hero, and they agree to help, and don't immediately have some sort of nervous breakdown, (or even a delayed mental breakdown when they kill someone for the first time, because that's always a stressful time in any hero's life,) that's when the real problems begin. Insisting on 'justice' all the time. Complaining that nobles can't just execute commoners for no reason. Smashing down a perfectly legitimate slave market and freeing the slaves, because slavery is somehow 'wrong'. Of course, that's all on top of the way they always assume they know more than you, just because your society relies on magic instead of technology and doesn't have smartphones. And don't even start on the way heroes keep insisting on inventing soy sauce all the time, never stopping to consider that perhaps the locals have taste buds that function slightly differently to their own, and maybe there's a good reason why they aren't already drinking mouldy beans.

To gamble on such low odds, someone would need to be truly desperate. Alas, with demons on the verge of overrunning his starving kingdom, King Edward Ricousian is truly desperate. He willingly chose to roll the dice, and now he's ended up saddled with Thomas.

Despite the best efforts of the king and his advisors, Thomas is going to get rather cross.

An embattled king summons an otherworldly hero to defend his starving kingdom from a demonic invasion. Alas for him, the summoned hero seems rather determined to ignore his carefully prepared script, spoiling the plans of humans and demons alike.