"Mari is one of the main characters in the Japanese manga ""Oh No! It's Alive."" She is a 17-year-old high school student who appears to be cute and innocent but is actually a skilled fighter.

Mari's appearance can be described as petite and adorable; she has short hair and is often seen wearing a school uniform or casual clothes. However, she is not to be underestimated as she possesses incredible strength and martial arts skills. Mari's fighting style revolves around speedy and precise movements, making her a formidable opponent to anyone who challenges her.

Mari's personality is complex; she is brave, determined, and stands up for what she believes in. However, her past traumas have made her reserved and hesitant to open up to people, making it difficult for her to trust others. Despite this, Mari has a kind heart and cares deeply for her friends, often putting herself in harm's way to protect them.

Throughout the story, Mari faces many challenges, both physical and emotional, but she never gives up and always finds a way to fight back. Her determination is admirable, and she is a great role model for readers.

In conclusion, Mari is a multi-dimensional character who is both physically and mentally strong. Her story highlights the importance of perseverance and is a great example of how even the seemingly weakest can become the strongest."