Don't fuck with people who have blue, red, green, or white hair.
Good-looking people should be spared in war because they will probably join your side. Ugly people can be killed indiscriminately.
You can participate in dozens of battles and kill hundreds of people, and still retain your cute, bubbly innocence with no change at all to your personality. There’s no such thing as PTSD.
Don’t ever give birth to a main character or you and your partner will surely die.
Sometimes it will even be at their hands!
It's okay to use child soldiers if they have special powers.
Archers don’t need to have a lot of muscle, even someone with a super model physique can shoot arrows.
Only a woman with cursed blood will ruin the world if she has children. A man with the same cursed blood won't do the same by fathering any. According to the village gossip, that is. note Technically, for the generation in question the only remaining person with the cursed bloodline was that one woman (Cigyn). If the same message was applied to Deirdre at some point, it's likely that the speaker assumed that Deirdre was Cigyn's only child. The man's heritage was not really a matter of public record, especially in that part of the world.
Furthermore, religious persecution is totally justified. All members and even descendants of an unacceptable religion must be put to death. Witch hunts are for the good of the world, and their only problem is not being thorough enough. Any survivors, no matter how well-intentioned or moral they might be, will eventually commit incest, and the resulting child will threaten the entire world. However, arranging multiple cousin marriages is perfectly acceptable if it will allow you to breed better soldiers to slaughter said descendants more effectively.
As long as you're pretty, have special powers and later on get possessed by a goddess, you can get away with committing atrocities like dousing soldiers with oil and setting them on fire.
Having the power to heal others by hurting yourself is a special gift, and makes you much more valuable than a normal healer who heals others without harming themselves.
It's acceptable to commit heinous war crimes against soldiers who are merely passing through your territory and not actually attacking anyone.
It's reasonable to believe in a curse without any proof, even when it means your country has to go to war and commit massacres because of it.
The lives of the people in your country are much more important than anybody else's.
If you're an alcoholic and/or gambler, you're a fucking useless dipshit who doesn't deserve anything good. Rehabilitation does not exist, it's just some old wife's tale.
But dating someone with the above characteristics is a great way to rebel against your parents and demonstrate your individuality.
Human trafficking is forgivable if the trafficker joins your side in a war.
Your brother’s best friend who betrayed him and sold him into slavery that one time? Total boyfriend material.
Patricide is justifiable... even when you know it is your father.
It's totally okay to nag your potential husband about the mask he always wears and demand he take it off for your satisfaction, even knowing he obviously wears it for comfort reasons!
In love with a girl who's in love with someone else and still hurting over it? Propose to her and promise to "heal" her of her painfully unrequited feelings, she'll totally say yes!
Micromanaging the relationships between your entire army is totally not-creepy and can even be necessary to ensure that their children will have optimal strength and skills. Or put simply: eugenics works.note this also applies to Genealogy to a lesser extent
Related to this, homosexual relationships are pointless and are thus not allowed, despite how much good chemistry the beefy chick and the sorceress have.
It's okay to be selfish and totally doom the world by refusing to kill the Big Bad if it means saving your One True Companion!
Having your love interest turn your guts to pudding is totally awesome and not at all painful!
It's okay to kill and maim things as long as you smile while you're doing it!
Once you get married and have children, you have no choice but to leave them in a Pocket Dimension to fend for themselves until they come of age. They'll thank you for it.
Merchants, Blacksmiths, Maids, and Butlers belong on the battlefield.
Patricide is great!
Nothing wrong with marrying your siblings so long as they're Not Blood Siblings even if you fell in love while thinking you were biologically related to them.
Enslaving warriors from across the multiverse and making them fight versions of themselves and their loved ones from alternate universes in an endless war is heroic, and they’ll all love you for it.
Being rich is better than having actual skill and strategic intelligence (like most gacha games, and arguably Real Life).
Sometimes, an enormous, powerful Eldritch Abomination is no match for a young girl in a skimpy bunny outfit who attacks by chucking lollipops or ice cream at her enemies.
You were way stronger as a kid. All those years of weapons training and battle experience just made you weaker. If you ever somehow end up facing your child-self in battle, be prepared for a humiliating defeat.
(Concerning Dimitri's redemption arc) Killing people is okay as long as you feel guilty for doing it.
(Concerning Bernadetta’s character arc) Anxiety is a hilarious personality quirk that you will eventually outgrow.
(Sylvain, Lorenz to an extent): Misogynistic womanizers should be forgiven when they can justify it with past traumas.
Trauma-induced PTSD, depression and DID? Serious issues that need to be handled delicately and properly addressed. Trauma-induced social anxiety and bipolar disorder? Cute and hilarious quirks that can be milked for comedy.
All routes except Silver Snow, but especially Crimson Flower: World peace can only be achieved through world conquest.
The spoilered route: World Peace can be achieved... through Theocracy.
Crimson Flower: If your country is being invaded by a Well-Intentioned Extremist, fighting back is morally wrong.
Being a noble is objectively better than being a commoner because it gives you a slightly higher Charm growth.
It's perfectly okay to hire someone with absolutely no teaching experience to become a military academy instructor, especially if you really want them to become the next incarnation of the goddess, and you're positive that the thirteenth time's the charm.
There’s nothing wrong with Teacher/Student Romance. Grooming underage students is fine as long as you wait five years for them to be of age.
Going into a five-year coma is a great way to speed up the “jail bait wait”. You’ll be able to pick up right where you left off with that former 15-year-old.
If students join your class because you're a popular teacher, they'll be willing to kill their friends, commit patricide or even commit Regicide for you!
Students can't — and shouldn't — communicate with anyone outside of their classes unless the weird new teacher forces them to mingle.
Passing exams is entirely based on luck unless you're ridiculously overqualified.
(Ferdinand and Dorothea's support) If you hate someone because of a past misunderstanding they've forgotten about, don't tell them what the deal is. Let them figure it out on their own.
(Shez's character arc) Revenge is always, always wrong, no matter what the passive-aggressive voices in your head say... Unless you feel guilty about it.
If someone kicks your ass and kills all your friends and coworkers, you should make active efforts to avoid ever having to fight them at all, even if you happen to be pit against each other later for reasons unrelated to your grudge. Failure to do so will directly kill someone close to you.
(Regarding Jean and Anna) It's okay to let little kids fight in wars if they're Wise Beyond Their Years.
(Regarding Chloé) People who have a Bizarre Taste in Food are freaks, and you should treat them as such.
(Regarding Yunaka) It's okay to let thieves join your cause, as long as they're on their best behavior.
If your child doesn't turn out the way that you want, then force them to turn into someone they're not against their will.
All death is final, and that's a sad thing. Unless you're the main character and have powerful friends, then you can cheat death multiple times.
(Regarding Nil) If your friend's sibling dies, then you should impersonate them so that your friend doesn't have to feel bad. Keep this up for as long as necessary, even if it's longer than a thousand years.
If alternate versions of your friend's other friends have turned into zombies, kill them when your friend isn't looking. They'll eventually figure it out on their own.
