Blake is described as being "mellow" by her voice actress, Arryn Zech. She displays a cool, reserved, and serious personality most of the time but does not lack a humorous side, which is usually in the form of dry wit and sarcasm. Blake is a righteous person, respecting other people's lives regardless of whether they are Faunus or not. She strongly despises those who judge and discriminate based on racial prejudice. Blake is outspoken, going so far as to indirectly insult the Schnee Dust Company in front of its heiress and defend Faunus of any kind.

Blake is shown to be an introvert. Although she reads books to distance herself from the discussion at hand, as the series continues, she is shown to be more facetious and friendly. Blake appears most conversant when discussing the history and plight of her people.

As a Faunus, Blake has faced discrimination in the past and wears a bow when around Humans in order to be treated for her character and not her species. However, despite having no hate for Humans, she has seen how the real world works and wonders how she can undo so many years of hate and pain. After the Fall of Beacon, Blake discards her bow and does not cover her ears again, even around the presence of Humans, showing she is no longer afraid to be seen as a Faunus.

Blake's past negatively influenced her personality, leading to moodiness, stubbornness, sleep deprivation and trust issues at times. However, she has a strong sense of righteousness. As a member of the White Fang during its former, peaceful leadership, Blake strongly disagrees with the level of violence and hatred they exhibit toward Humans. She sees her Semblance as a prospect of her tendency to avoid conflict, especially when caused by the White Fang, but Sun persuades her to let her friends help her as much as she believes she is helping them. She uses this in turn to persuade Ilia to leave the White Fang and to confront Adam with others' help.

Her Faunus traits also seem to give her other aspects of a cat, such as climbing up to Ruby's bed to stay away from Ruby and Yang's pet dog, Zwei. Another time, she is distracted by and instinctively decides to follow a laser pointer light to a waiting Yang in "Burning the Candle". She also has a great love for tuna, as shown in "Round One" where she drools over a bowl of noodles topped with tuna fish.

Try to sound exactly like her from the Show!