One of the things that makes My Hero Academia so charming is its vibrant and complex cast of characters. The protagonist, Izuku Midoriya, is a typical shonen hero in some ways, but his analytical, yet anxious, nature makes him unique. Tenya Iida, despite his powerfully held belief in following the rules and behaving logically, can still be overcome by rage, and it shows when his brother is attacked by a villain. Though people might not share the same experiences with these characters, it's generally easy to see personality traits they have in common.
Any person can match up their unique qualities using only their zodiac sign. A sign not only reveals important information about someone's personality, but it can be used to decide which character they most align with. Like Attack on Titan and Fullmetal Alchemist, My Hero Academia boasts an equally diverse and intriguing cast.
An Aries hates losing more than anything in the world, just like Katsuki Bakugo. This fiery sign wants to be number one at everything they do, and they often succeed. They are bold, unstoppable forces of nature with tons of energy. These traits are crucial for a trainee hero like Bakugo.
On the flip side, Ariens can take unnecessary risks to catapult themselves to victory. On the rare occasion that they lose, their jealous side kicks in. Ariens also have a tendency to boss others around, and can get pretty self-centered when it comes to their desire to be the best. All these traits are on full display whenever Bakugo has a conversation with his rival, Izuku Midoriya.
Yuuga Aoyama wants three things in life: to stay relatively safe, to show off how sparkly and beautiful he is, and to eat fancy cheese. This aligns nicely with the desires often expressed by Taureans. This sign has a powerful need for security, and may avoid taking risks even when those risks would benefit them.
They also love luxury, reveling in gourmet food and taking great care of their appearance. Taurus is also a deeply romantic sign, which suits Aoyama and his seemingly endless supply of roses.
Geminis are charming, adventurous people who are always the life of the party. That description fits All Might most of the time. When he isn't hyping everyone else up, he's exhibiting another Gemini trait: a tendency to hide more murky information about oneself. While All Might isn't exactly hiding an evil side, he is hiding some of the darker moments from his past.
When talking to his protege Izuku, he tends to gloss over the painful details like his fight against All For One, and how his grievous injury came to be.
Cancers are natural nurturers who go out of their way to help those in need. This is a crucial trait for any would-be hero, but Izuku Midoriya demonstrates it more than anyone. Whether it's rushing in to save Katsuki Bakugo from a giant slime monster despite having no powers, or trying to help Shoto Todoroki overcome his emotional issues, Izuku is the definition of caring.
His Cancer nature is also what causes him to help others to his own detriment. Izuku often runs headlong into danger, willingly shattering his own bones or losing points in a tournament if it means making sure others are safe and happy.