This is a list of minor characters that have appeared or are mentioned in passing in the Clockwork Lullaby Series, including in its songs or other related media.
A pair of shackles that bound both of the Unknown Len Character's legs while he was trapped within the Clockwork, representing the color of someone's tears. As the spring began to rotate, the blue shackles disappeared from the boy's body and told him that today was his new birthday. They are portrayed by the Vocaloid KAITO.
Serial number BMD2-R[note 1] was a toy created in the C Factory. When it was discovered that she had self awareness, she was deemed "irregular" and tossed away. Knowing the way out, she refused to become disposed of and begged the other toys to help her but the only one who would listen to her was another toy of the same model, SN7F. Together they escaped the garbage chute and resolved to escape the factory together to the world outside, as BMD2 was certain they would find someone who could love them. Whilst fleeing, the two toys met TYPE-L, another toy who resembled them who congratulated them on their escape and told them to flee as a robot named "G" was chasing after them. She is represented by the Vocaloid Kagamine Rin.
G[note 2] was a robot created by the I company to dispose of "irregular" toys. He was sent out in the C Factory to take care of the toys BMD2-R and SN7F-R and chased after through out the building in an attempt to catch them before they reached the exit. He is represented by the Vocaloid Camui Gackpo.
An unidentified character that bears a sin of desire. A mysterious girl sung a lullaby to the person, however she expressed uncertainty of it ever being able to heal their heart, feeling as if they were still caught up in a dream.
A pair of handcuffs that bound both of the Unknown Len Character's arms while he was trapped within the Clockwork, representing the color of someone's blood. As the Clockwork began to rotate and light up, the red handcuffs disappeared from the boy's body and whispered that he shall be reborn soon. They are portrayed by the Vocaloid MEIKO.
Serial number SN7F-R[note 3] was a toy created in the C Factory. When it was discovered that she had self awareness, she was deemed "irregular" and tossed away. She, like all the other toys, knew the way out, but she also knew that the world outside was a malicious place and there was no point in escaping. However when she saw the optimism and hope of another toy similar to herself, BMD2, she was moved and decided to help her out and accompany her, but refused to admit it to her. Whilst fleeing, the two toys met TYPE-L, another toy who resembled them who congratulated them on their escape and told them to flee as a robot named "G" was chasing after them. She is represented by the Vocaloid Kagamine Rin.
TYPE-L[note 4] was a toy created in the C Factory. His model resembled that of the "R" toys. Through unknown means, he had managed to roam free in the factory and met the toys BMD2 and SN7F and congratulated them on their escape but told them to keep fleeing as the robot G had been sent to find and destroy them. He is represented by the Vocaloid Kagamine Len.
Unknown Miku Character
An unidentified character that spoke to the Unknown Len Character from beyond the spring. While he was trapped within there, her eerie voice called out to him and told the "sinful boy" that he was destined to be confined within that room for all of eternity. She is portrayed by the Vocaloid Hatsune Miku.
Unknown Len Character
An unnamed boy trapped in an unknown location below a spring. As he woke up in a place where he couldn't see or hear anything, an eerie voice told him he would be trapped there forever. Recalling his sins, and that he could go back to that time, he noticed he was bound by red chains and blue shackles, also wondering who was singing the mysterious lullaby he heard in his prison.
After an unknown amount of time, the boy added his own words to the lullaby. As a small light fell from the spring, he realized it was a certain person's message to him. With his chains coming off, the boy prepared to meet that person again as he was about to be reborn. He is represented by the Vocaloid Kagamine Len.
Unknown Rin Character
An unnamed girl who sang the Clockwork Lullaby. At some point, she began learning various words, learning both the shape and darkness of the world. Struggling to express herself, and at one point abandoned by the person who taught her words, she resolved to continue her playing with words.
Later on, she attempted to create the person who created her, performing experiments under the moon. She then began stringing the words she learned into a song, the Clockwork Lullaby, singing it with the hopes of healing a certain person. The girl also, at some point, tried to confirm her existence using "Pandora's box", to no avail. She is represented by the Vocaloid Kagamine Rin.
Unknown Visitor 1
An unidentified treasure hunter that stumbled upon Evil's Theater. Hoping to get rich quick, the person went after Gallerian Marlon's fabled treasure said to be hidden in Evil's Theater. While traversing Evil's Forest, they came across a woman and she greeted the treasure hunter, introducing herself as formerly Ma and currently the Gardener. The woman then explained the rules of the forest, warning them to flee at the sight of two shady twins and a woman with a nasty appetite.
Ma then told the intruder to not bother remembering her rules, as they would change the next day. Remembering another one, Ma told the them not to trust what people said in the forest. Soon after, the treasure hunter stumbled upon Evil's Theater and its ominous graveyard. They were then captured and killed by the "Servants" Arte and Pollo and devoured by the Master of the Graveyard.
Unknown Visitor 2
An unidentified treasure hunter that stumbled upon Evil's Theater. Despite warnings of inevitable death to those who entered Evils Forest, they entered in search of Gallerian Marlon's fortune in the theater. After passing through the graveyard, the intruder was captured and awaited a "trial" by the Master of the Court. Ma accompanied them and began showing fifteen films before the intruder was put on trial and quickly sentenced to death.