Kingdom Hearts Concepts

Mental condition of when someone forgets almost all of his or her past, including his/her identity. Some anime characters have such an allingment.

A concept where several characters from different, separate stories and series meet up.

A animal or even a person that is basically a slave to another person. Familiars typically are tame, obediant and magical, though not always.

The Heartless Emblem is usually on/wore by a Heartless or someone that controls them. The emblem is also sometimes seen on buildings that are associated with them.

An Illusion is a condition of being deceived by a false perception or belief.

Magic is an often used term in fiction. It is the concept of affecting the universe through supernatural methods and breaking the physical laws.

In the Kingdom Hearts Franchise, when some poor soul becomes a Heartless after he's beaten, the victim's body turns into a Nobody. The symbol can be seen on buildings that are involved with them.

This is the Organization that controls all the Nobodies that Sora and friends face. The 13 people who run the Organization are Nobodies themselves.

Someone part of a royal family.

Much like the "tournament Style" of telling a story arc, it is when a small protagonist group storm an enemy base, facing off new powerful enemies in one to one combat, until they reached the "Big Bad Boss" of the story arc in a final showdown.

The character is summoned from some place else and generally it means he/she/it became someone's familiar.

Usually special animals that have the ability to speak to humans. Talking animals are a big part in several animes and mangas