What key animation concept relates to creating charismatic characters in animation?

The concept that relates most closely to creating charismatic characters in animation is appeal. In animation, appeal refers to the quality that makes a character engaging, charming, and relatable to the audience. It's an essential principle for animators, as characters with strong appeal can easily capture viewers' attention and evoke an emotional connection.

A well-designed character with appeal often possesses distinctive features, expressive movements, and a personality that resonates with viewers. This makes them memorable and enjoyable, facilitating a deeper investment in the character's story and experiences. The notion of appeal emphasizes not just aesthetic design but also the character's ability to convey emotions and traits that resonate with the audience.

Other concepts such as exaggeration, solid drawing, and character design do play important roles in animation, but they focus on different aspects. Exaggeration enhances actions and expressions, solid drawing pertains to the technical representation of characters, and character design encompasses the overall creation of a character's look and identity. While these elements contribute to making a character appealing, the essence of charisma lies in the overarching principle of appeal.