An Ordinary High-School Student living in Japan. Had a close encounter with the Dragon while she rampaged through the city, and has been followed by her ever since. Lives with his mom, who openly lusts for him.Tropes associated with the protagonist:
A Man Is Always Eager: Averted the first few times (especially the very first), but it's never long before he gets into it.
Black Knight: The Dragon Slayer armor chooses him to become its next wearer.
A white 'Ether Dragon' who razed the city of Tokyo to the ground, but reverted to the form of a human girl in order to hide from a Dragon Slayer. Fell madly in love with the Protagonist after he struck her Reverse Scale after she tried to eat the protagonist.Tropes associated the Dragon:
Ax-Crazy: She's no sadist, but her Blue and Orange Morality makes her incapable of caring about collateral damage when using her dragon breath for everything from protecting the Protagonist to chasing him through the school.
Fridge Horror sets in when you realize the sheer amount of destruction she's caused, and how her body count must in the tens of thousands by the end of the story and how little she cares about it.
Bizarre Alien Biology: A 'Reverse Scale' located in her throat that acts as a weak point. Being struck there forces her to change into her humanoid form, or if attacked there by the Dragon Slayer, will kill her. Apparently, it can also be used for Fantastic Arousal.
Black Comedy Rape: Her first sexual encounter with the protagonist is like this, with her asking why he doesn't stop her if he doesn't want it.
Blue and Orange Morality: Everything from her inability to care about collateral damage to her... Interesting views on love and romance.
Death Seeker: She believes her relationship with the Protagonist, whom she refers to as 'the hero,' isn't complete until he does the heroic thing and slays the dragon, I.E. killing her. She finally drops this entirely during the Unfaithful Ending.
Redemption Demotion: Possibly, in the above. The Protagonist says that she's the hero's true reward: a princess, instead of the dragon he has to slay. However, considering she still has her Cute Little Fangs and Hellish Pupils, it's possible that she didn't actually Become A Real Girl, and that he really just said that as a way of stating once and for all that he loves her and refuses to kill her, and no dragon or suit of armor will tell him otherwise.
Loveable Sex Maniac: And she has NO problem talking about what she and the protagonist do while in public.
Person of Mass Destruction / One Girl Army: Even after her transformation into a humanoid form, she can still cause catastrophic damage to an entire city just while chasing the protagonist around. Not to mention she tossed around Power Armor wearing JSDF mooks like rag dolls.
Puny Humans: Being pelted with machine gun fire and missiles gets little more than an annoyed eye roll from her.
What Is This Thing You Call Love?: She won't shut up about 'romance.' Dragons view romance in the old definition of the term, like an epic or story. She believes her 'romance' isn't complete with the protagonist until he kills her, but she adopts the more modern definition after the Protagonist convinces her how stupid that is in the Good Ending.
Woobie, Destroyer of Worlds: When asked why she kept trying to kill the Protagonist if she loves him, she responds by saying that is the only way dragons feel able to express themselves to humans. She can't separate the idea of loving someone from hurting or even eating them, while still being normal enough for it to hurt her.
The Protagonist's mother. She looks like a little kid, but she's Older Than She Looks. She's also a general in the JSDF, and the leader of the anti-fantasy division. She openly lusts after her son, and is incredibly jealous of the Dragon.Tropes associated with the General:
Yandere: Absolutely despises the Dragon for having stolen her son's virginity (which she wanted for herself), and occasionally will shoot her when she makes her angry, despite bullets having no affect on her. It probably doesn't help that the Dragon reminds her of her and the Protagonist's relationship every chance she gets.
An emotionless knight in black armor sent to kill the Dragon. Because he is also considered fantasy, conventional weapons don't work on him, either. It's actually not a knight at all, but a knight's armor sent to find the next 'hero' to slay the Dragon; this hero being the Protagonist.
Armor of Invincibility: Bullets are totally useless against it, and it can take quite a lot of damage from the Dragon.
Empathic Weapon: There's nobody inside the armor. But whoever is deemed worthy of wearing it is patched in to the Hive Mind, which alerts its wearer of incoming damage, and constantly reminds them of their goal... much to the Protagonist's annoyance.
The Unfettered: God help you if he thinks you're a hindrance to his mission.
Well-Intentioned Extremist: Played with. Killing a Dragon rampaging through a town would probably be a good thing in any other case... if that dragon wasn't your girlfriend. His flagrant disregard for collateral damage doesn't help his case.
Whole Costume Reference: As mention on Captain Ersatz his Armor has some resemblance to Guts's Berserker Armor.Although he is actually a walking suit of armor.