Some demons resembling real-world animals can die, but not graphically. The image simply fades away. If the demon belongs to any of the player characters it can be revived during or outside battle.
Not intentionally, some demons resemble dogs and can be used to fight other dog-like demons, but the fights aren't graphic (pictures being moved around)
If you are specifically sensitive for dog fights, just avoid picking dog-like demons to fight in battle.
Depends on the ending you choose. Some have good endings and some are good for the protagonist and a select few others but bad for the world at large. Yuzu’s ending however is just straight bad for everyone (this is also the default ending you get if you fail to meet the requirements for any of the other ones).
No scenes focusing on it, but nudity is present. Some demons have nude humanoid designs without genitals. A handful of feminine presenting demons wear revealing clothing.
A possessed (and underage) female character will have her clothes unbuttoned to reveal part of her bare chest. Obviously no nipples shown or outlined but it's very revealing.
Attacks in battle include fire spells that burn the enemy, although it's just a fire sprite without actual graphic imagery.
A teenage character dies by a demon burning them alive, this is depicted more graphically in isometric view. No blood but the charred body is shown.
Demons with human and non-human forms are frequently defeated and killed, but not all deaths are permanent and they can be revived during or after battle.
Not outright, but Haru essentially says she wants to die and there’s several times in the game where she doesn’t even try to defend herself during an attack because she’s just hoping she’ll die in the crossfire.
Many innocent civilians die during and before the events of the game, including the player characters when they lose a battle. In most cases deaths remain as text mentions and dying characters simply fade away with the exception of a few story cutscenes.
The main player characters are older teens and can die during battle. In the story they are aware of potential times they are predicted to die (which can be avoided).
A teenage girl is hunted down by a mob who actively try to kill her and voice their desire to do so.
An older teenage boy is predicted to be killed, but this can be prevented.
Dead citizens are frequently mentioned, which presumably includes children.
Several snake demons exist and can be seen throughout the game, as well as a snake demon race, do note not every demon of this race will look like an actual snake.
On the 5th day Yuzu will describe a comment by Atsuro using said word during an event, can be skipped by avoiding the event showing only Atsuro's icon.
A character attempts suicide by cop (intentionally instigating a situation where a cop fatally shoots you by attacking them, threatening them etc.). You can prevent them from going through with it by showing up on time and talking them out of it, but they can succeed if you fail to show up on time or goad them into doing it
Extremely. The Christian God and his angels are active figures in the games narrative and directly involved in the events taking place. You can either side with him, against him or resolve the conflict on your own without divine or demonic assistance. The game also heavily features the Tower of Babel, and one of the main villains is a reincarnation of Cain, the first murderer from the Bible, and it’s revealed later in the game that the protagonist is a reincarnation of his brother Abel. You can choose to side with Cain, against him, or dispel the conflict entirely.