As the main character of Darling In The Franxx, Zero Two has been praised for her strong and unique personality. She paved the way for Darling In The Franxx to be a well-respected mecha anime by adding depth and interest into their world's dystopian backstory. DITF's use of partners to save the world from klaxosaurs made this science fiction anime quite romantic.

RELATED: Darling In The Franxx: 5 Reasons Hiro & Zero Two Are The Perfect Couple (& 5 Reasons They're Horrible For Each Other)

However, Zero Two didn't always show her best side to others, and she became known as the 'partner killer' because she annihilated anyone who dared to drive a bio-mechanical weapon with her. Throughout the season, she had some extreme highs and lows, but these made her characterization all the better.

10 Best Traits: A Playful Attitude Creates Fun Experiences

Zero two

A month after a tough battle, Squad 13 is forced to relocate and pick up the pieces of their lives. They are living in isolation, with no contact from adults or the outside world. This is the first time the audience sees Zero Two's relationship with the parasites improve drastically, and is also a moment where her playful persona is broadcasted.

Specifically, her interaction with the other girls in the bathtub shows how much she's grown to show human emotions. Zero Two sits still as Miku washes her hair, and the two of them converse about boys before Zero Two pushes her underwater. This is an excellent moment where the audience gets to see two people who once alienated themselves from each other bond in a goofy way.

9 Worst Traits: Disregards Rules And Regulations

Zero two darling in the francs

It's no secret that Zero Two tends to be rebellious, often choosing to do things her own way. However, when she ignores direct orders from the leader, all hell breaks loose. Even her partner Hiro couldn't hold her back from using her rage as fuel in battle. Unfortunately, this isn't the first time fans have seen her disregard commands.

RELATED: 10 Best Manga With Strong Female Leads

Zero Two and Hiro's robot, Strelizia, jumped into action after their teammates struggle to defeat the Klaxosaurs. This rule break almost cost Hiro his life and causes Two to have to defeat the enemy alone. Her reckless display of emotions proved that breaking the rules does not guarantee a team's success.

8 Best Traits: Her Affection For Her Teammates

Zero Two in Darling In The Franxx

At first, Zero Two is illustrated as a self-interested individual who was willing to risk anyone's life to achieve a goal. Despite being introduced to her past persona, the audience experienced a change of heart when they see her warm up to others. This was especially true after she spends more time with her teammates in isolation.

She stands by Kokoro and Mitsuru when they decide to have a wedding and shares her drawings of what marriage and a wedding dress would look like. The subtle actions she takes to be included in the group prove how attached she's become to the other parasites.

7 Worst Traits: Impulsivity Leads To Disgust

Zero Two being impulsive

Fans can agree on a lot of episodes that make Zero Two an evocative waifu, but there were a few scenes that scared some admirers. Two interrupts the rest of Squad 13's breakfast by sitting on Hiro's lap. She proceeds to pour honey all over his breakfast, sending the parasites at the table into a frenzy.

This might have been the first instance of major shock, but it wasn't the last. Two has also invaded the personal space of Ichigo; she licks her cheek while flirtatiously telling her that she tastes sweet. Ichigo is immediately embarrassed and taken back, which increased her suspiciousness of Two's sanity.

6 Best Traits: Sacrifice Means Everything

hiro-and-zero-two-darling-in-the-franxx

One of the best indicators of Zero Two's growth was at the end of Darling In The Franxx. As an act of self-sacrifice, she tries to bring the war against VIRM to an end so she can save civilians and her kind. She is fighting on a galactic warfront, with her body left in a catatonic state at home. The parasites vow to protect her body, and her act of kindness gives the plot a climatic effect.

RELATED: Darling In The Franxx: 5 Ways The Finale Was Perfect (& 5 Ways It's Not)

It was this scene that allowed viewers to see the weight that she had been carrying the entire series. Her anger was a way to protect her heart, and her sacrifice showed people she had a heart all along.

5 Worst Traits: A Cold Look In The Mirror

Zero Two and Hiro in Darling In The Franxx

Like any relationship, Hiro and Zero Two's connection had some downfalls. One of them is that Two starts to define her worth on how Hiro sees her, which leaves a lot of room for insecurity. When their connection is still blooming, Two attempts to kiss Hiro and he catches a glimpse of her canine teeth. He reacts by withdrawing from her, a move that portrays his discomfort with how different she was.

Yet, the audience doesn't get to look into the mind of Hiro, so no one knows which emotions he felt. What the audience does observe is Two's frigid expression. She continues to break mirrors in the house after this, an action that conveys how easily Hiro's emotions could affect her view of herself.

4 Best Traits: Self Reflection Opens Doors For Emotional Vulnerability

Zero Two and Hiro

As a strong female protagonist, Two tends to be prideful when making decisions and accepting her mistakes. Still, she manages to unguard her heart after realizing she hurt Hiro's. After accidentally accusing the other parasites of lying to her about Hiro's location, she goes on a rampage and hurts the people Hiro loves the most. Hiro calls her a monster, an insult that sets off Two's guilt. It doesn't take long for Two to admit her faults and see herself the way Hiro sees her.

3 Worst Traits: Honesty Isn't Always The Best Policy

two in the darling in the franxx

Being honest is usually a trait that others appreciate, but sometimes it can be detrimental to friendships and relationships. Sugarcoating words isn't something Zero Two does, as she prefers bluntness and dominance. Unfortunately, honesty can destroy someone's feelings, which she does without realizing. It's not shocking how little she regards human life, but it is shocking seeing how verbal she is about this belief to the person she loves the most.

RELATED: Darling In The Franxx: 10 Fun Facts About Hiro You Need To Know

Two tries to sympathize with Hiro by convincing him to run away with her, but her method of persuasion was by stating that everyone was going to die anyway. In Your Thorn, My Badge, she boldly declares that if Hiro died, he wouldn't have amounted too much.

2 Best Traits: Loyalty Runs Through Blue Blood

Zero Two

What sets Zero Two apart from other famous waifus is how far she is willing to go to be with the person she loves. At a young age, Hiro and Two are introduced. Hiro helps her escape, and they read a forbidden picture book. This was the first time Hiro agrees to be her 'darling' and Two's first introduction to the outside world.

Even though years have passed, Two still remembers Hiro and maintains the same expectation that he would marry her. She does not feel that loyalty to anyone else, even after Hiro doesn't recognize her. In her eyes, the only partner meant for her is Hiro.

1 Worst Traits: Sabotage And Self Hatred

Zero Two Darling in the franxx

Two has a habit of sabotaging her relationships with her need for violence and murder. Nevertheless, her rage stems from a deep-rooted emotion that she fails to come to terms with until later on in Darling In The Franxx. By those who institutionalized her, Two was taught that if she killed enough klaxosaurs, she would become human.

This fueled her aggression towards klaxosaurs and her disapproval of anyone who got in her way. All she wanted was to fit in, but she ended up hurting the people who accepted her in the process. Hatred grew in her like a disease, and it wasn't until she could accept herself that she could change into a selfless character.

NEXT: 10 Anime To Watch If You Like Darling In The Franxx