Haiku is a minor character in The Loud House.
She first appears in the episode "Dance, Dance Resolution", in which Lucy wants Lincoln to have a date, in order to attend the Sadie Hawkins Dance. When Ronnie Anne arrives unexpectedly, Lincoln tells his friends to cover for him, while he tries to escape. Clyde ends up hanging out with Haiku, confessing to her that his heart is for someone else. Haiku also confesses that her heart is for someone else: a vampire who just turned 200. When Haiku finds out about Lincoln's plan, she admits that she had a better time hanging out with Clyde, as they bonded over their shared pain over loving someone who couldn't love them back. She is last seen waltzing with Clyde, as both of them look at pictures of their respective crushes.
In "Fandom Pains", Haiku, along with the other members of the Morticians Club, is angry about Tristan's sudden appearance in Vampires of Melancholia, and collect signatures to remove him from the show.
In "Friendzy", Haiku is one of the many friends Lucy invites over.
Haiku is mostly a calm girl, fascinated by poetry and gothic literature. Like her friend Lucy, Haiku is an aspiring poet, and has her own diary to write poems in. When Lincoln told her a simple improvised poem about Jack and Jill, she interpreted it as deeper thoughts than there really were.
She speaks with a calm, emotionless tone, and rarely smiles. Like Lucy, she has affections towards a likely fictional vampire, and she wears a locket with her love interest. When all the students were dancing, Haiku preferred her diary over dancing, except for a slow waltzing with Clyde.
According to Clyde, Haiku dislikes cats, sunlight, and people who smile too much. She also dislikes dishonesty.
Haiku has a slender figure, with skin as pale as Lucy's. She has long black hair, with a reflective shine, and has reflective purple eye shadow. She wears a long dark purple dress, black belt with white skull, and dark purple finger-less gloves.