While appearing to be a cat-like creature, Morgana emphatically insists to be a human, and sticks with the Phantom Thieves as he believes they'll be able to help him discover his origins and regain his true form. Despite this, sometimes he instinctively meows and self-grooms, being able to get used to his lifestyle as a cat easily. However, he demonstrates a number of qualities which are absent in ordinary animals - a sense of morality, empathy, and even a sense of style. But even though Morgana's intelligent, he's shown to be out of touch with the modern world. This is conveyed through his unfamiliarity with technology, and his initial assumption that his knowledge on the Metaverse is supposed to be common sense.

Morgana lacks a sense of self, not remembering anything about who he is or where he comes from. This is the foundation of an identity crisis, as he's often confused and uncertain about who he really is. However, he feels that his appearance of a cat prevents him from being seen for who he is. His end goal ends up being to change his appearance into a human, which he shows deep satisfaction with. His appearance often makes it easy for others to act indifferent towards, often on accident, making him a regular victim of comical abuse.

Morgana is also often incomprehensible, as he often fails to convey his feelings through words properly. For example, despite often stating his end goal is to become human, he rarely manages to express why he wants to do so or why he's worried about it, making it very easy for his words to become lost in translation and have others take his motivations at face value.

Morgana knows how to be dignified and level-headed, and often adopts a more realistic and logical mindset, easily prioritizing important missions over his own personal agenda. He strongly believes in doing the right thing, as he's willing to speak against injustice, and has shown to consider that the ideal person is a hero figure that helps people in need, which leads him to act gallantly at times. Morgana keeps things fair, conveyed by his settling give-and-take deals between others, and never goes back on his word either, as he promised to guide the protagonist and Ryuji out of Kamoshida's Palace when they first met, on the condition that they free him from his cage. In addition, he shows initiative and determination when it comes to facing risks, as demonstrated by his courage to face the consequences behind the possibility of causing a mental shutdown in Suguru Kamoshida. And though some of his teammates might be pressured into questioning their morals in terms of whether what they're doing is right, Morgana shows autonomous faith in his own ideals.

When executing plans, Morgana can be rather strict with his teammates, making him outspoken and blunt in stating his opinions. He can be rather irritable, instinctively warning or scolding his teammates if they're not careful. In addition, Morgana can be quite mischievous when pushing his friends into self-improvement, especially towards situations where they seem to accept their mistakes, neglect change or avoid taking responsibility, often with the goal of teaching them a lesson or knocking them back to their senses. This especially applies to Ryuji Sakamoto, who initially shows comfort in his public image as a no-good thug, or even if he's reckless and naively inconsiderate. However, if such a mistake ends up being crucial, he can easily resort to anger instead. Either way, he doesn't rub salt in the wound if the person ends up feeling ashamed or guilty over their actions, and can empathize with them. This treatment includes Futaba Sakura while she was learning to open up and overcome her anxiety and distrust, having him withstand her playful abuse and any trouble that came his way.

Morgana is chivalrous in nature, showing a very gentlemanly side towards women. This is most apparent with Ann Takamaki, who possesses an empathetic and courageous personality, alongside her beauty; he refers to her as "Lady Ann" out of noble respect. Compared to others, Morgana initially doesn't get agitated over being misunderstood by her, as what she says often came out of fear and stress, and notices that she shows the desire to understand him and his feelings, one reason why he could develop a crush. This leads him to often trying to impress her, and though Ann never realizes he has romantic feelings for her, she shows gratitude in his gestures nonetheless. However, Morgana has a perverted side as well, as he and Ryuji were caught trying to peek under her skirt during their hot pot celebration.

Though he has an idea of how to be dignified, deep down Morgana is more optimistic, making him a heavy daydreamer and potentially naive: he often immerses himself in his ideal self's shoes, as he's shown to fantasize about what would happen if he were to become human, to the point where he imagines his supposed true form having the appearance a handsome man while living a luxurious life. Additionally, he's modest with his own general value, thinking lowly of himself over others, making him naturally empathetic. This could expand towards fiction as well, making it easy for him to absorb himself in films and books. Though he keeps his true feelings to himself, over time he begins to open up to the protagonist, rambling freely about his inner thoughts and dreams.

Morgana likely attempts to brush aside his uncertainty by stacking a more positive interpretation of himself, and goes around it with thoughtless boasting, which might have a healthy effect on his mental state. It seems to be purposefully over more insignificant things or as a joke, like Sojiro Sakura's seeming preference for him over the protagonist, as Morgana seems to brush off or forget about details like these immediately after. Same goes for making fun of his friends, which likely helps him open up bit by bit in front of them.

But despite being optimistic at the core, Morgana has a weak side - in reality, he's deeply worried about who he really is and where he belongs. His uncertainty leads him to even question the integrity of his feelings, slowly becoming disconnected with them in the process. His condition worsens as he fails to make any progress on discovering anything about himself for months: eventually, he even forces himself to be positive, but the effect of that inevitably wears off as well.

Once he loses his sense of self entirely, he begins to assume general consensus and his friends' opinion of him as the truth, lacking the certainty to reject the idea they're more qualified to define what he is over himself. Worse, as Futaba joins the group and replaces him as Navigator, he begins to question his role in the group and all the knowledge he believed he had on the Metaverse, causing him to worry about how he doesn't compare to others. This results him to perceive himself as a worthless cat, leaving him in a state of withdrawal. However, Haru Okumura teaches him that he should find the courage to trust his own true feelings and that doing so won't disconnect him from his friends. In the end, Morgana admits that he doesn't understand who he is and doesn't feel like he has a justified reason to stay with the group, but despite this, since he has no other place to go, he wants to stay with the Phantom Thieves of Hearts as it's the only place he can belong. With them showing acceptance in return, he finds comfort in trusting himself, realizing that it doesn't matter if he doesn't understand himself, as he's now certain he'll belong no matter what.

Morgana's overall loyal to the Phantom Thieves, treating them as equals during missions and gatherings due to the nature of their deal, having both sides require one-another to work together in order to succeed. He refers to a number of contributions or mistakes the team makes to be united effort, constantly referring to these actions in "we." Though he's initially held a distant give-and-take relationship with the Thieves and has been planning on leaving the group and moving on after restoring his memory, his fruitless journey led to the Phantom Thieves growing on him and slowly began to love being with them. He's shown gratitude for their hospitality, especially since he has no other place to belong. This helped develop a sense of duty towards their goals, boosting his loyalty to a state of selflessness, to the point where he's willing to sacrifice himself in order to protect his friends.

Morgana's shown to get engrossed by "the embodiment of human desire." When something that fits that description is in display, he loses all sense of reason and starts fawning over it out of affection and admiration, as demonstrated with Kamoshida's treasure. Near the end, Morgana remembers that humans are actually people he looks up to, and has shown to value them and their potential to change the world dearly. This is likely why he's shown to fawn over human desires at first, as he's been obsessed with belonging among them. However, this compulsion was shown to be neutralized after Morgana learned that he belongs in the Phantom Thieves, as Ann pointed out that he seemed calm and collected when he took Okumura's treasure. Despite this, he still holds a passion for humans in the end, so seeing them imprison themselves in Mementos so their wishes are granted was something that saddened him, and did everything he could to knock them back to their senses. Even though Morgana demonstrates modesty in terms of his own general value, he's persistent in following his own feelings, and in turn, protecting what he cares for.