T V T R O P E S
→
Babies Make Everything BetterLuca apparently holds this belief. He thinks that if Alois marries Ciel and they have a baby, then Alois will be happy forever. Sadly, that's not the case, as Alois has tried to explain to him.
→
Big Brother ComplexLuca absolutely adores his Brother. Because Alois ( then Jim ) raised him and cared for him and protected him, Luca is devoted to him to the point of stupidity. There is no one greater than his brother, who can never be wrong or bad in his eyes.
→
Big Brother InstinctOr in this case, little brother instinct. Luca called a demon down for his brother, because what he wanted most was for Alois to be happy.
→
Cheerful ChildGiven his age, it's not surprising. But Luca is a naturally happy and energetic child.
→
Children are InnocentIn a series surrounded by children with evil intents, Luca is a breath of fresh air. This isn't to say he doesn't have his own issues, because he does, but he handles them better and he's never done anything out of cruelty or malice.
→
Creepy ChildDespite his "children are innocent" inclusion, he has underlying shades of this, just for the sheer factor of while he didn't order the village's death out of hate or malice, he still understood that he was asking for an entire town to be murdered, felt nothing about it, and does not regret it. He's also shown recent signs in Siren's Pull that he's much more aware of the consequences of what he did than most think.
→
Dark Skinned Red HeadLuca is this in contrast to his pale skinned and fair haired brother. Possibly a factor in the village's treatment of him, as in Britian there is a prejudice against red hair.
→
Deal With The DevilHe was the one who formed the contract with the demon Hannah Annafellows to have the town destroyed.
→
Go Out With A SmileHe smiles as he thanks Hannah for granting his wish just before he dies. Hannah notes this is the first time anyone had ever been genuinely happy to see her, and it reduces her to tears.
→
Meaningful EchoLuca is the one who coined the "Yes, Your Highness" phrase that Claude addresses Alois with.
→
Meaningful NameSort of an in-joke for the Kuro!Shota players in Siren's Pull: It was joked that when Luca asks Alois where babies come from he'll be told they bloom from flowers. A few weeks later, it was discovered that, in Japanaese, Luca means "Bright Blue Flower".
→
MoeLuca is so genuinely adorable and sweet that he made a bitter and emotionless demon fall in love and even cry.
→
Moment KillerOne of the biggest jokes regarding Luca.
→
NakamaLuca considers everyone in Shotaville/Phancyhive Manor/Shota Manor this.
→
Not So HarmlessThrough all the moe and giggling and babies ducks, it can be easy to forget Luca is the one who called a demon down to kill an entire village. How he did it is still a mystery.
→
Security BlanketHe has two: One in the form of his pet duck Quackers, and the stuffed rabbit Jack gave him who he's named Goodnight.
He also acts as this to Alois.
→
Tell Me About My Father Alois told an upset Luca about their parents at his request. However, not even Alois properly remembers what they were like, and made up most of it.
→
Troubling Unchildhood BehaviorLuca has this in spades, usually in reference to demons and the deal he made.
→
Vague AgeLuca's age is never actually stated in canon, but he looks around 5-7. He's been put at 6 in Siren's Pull.
F A N A R T / M A C R O S