TV-Series
Description
Mero Seto is a supporting character in the anime Jellyfish Can't Swim in the Night. She is the current center of the idol group Sunflower Dolls, which restarted after a major shake-up. She has shoulder-length purple hair and purple eyes, and her appearance is often accented by red ribbons. Her public persona is that of a sweet, angelic girl who charms everyone around her with her cuteness and approachability.

In terms of background, Mero was originally a member of Sunflower Dolls alongside Kano Yamanouchi, who performed under the stage name Nonoka Tachibana. When Kano was involved in a scandal that led to her departure from the group, Mero remained and rose to become the center of the reorganized unit. She carried the group's reputation through a difficult transition and eventually led them to a successful comeback tour, solidifying her status as a symbol of resilience in the idol industry.

Mero's personality is more complex than her innocent image suggests. While she presents a warm and loving exterior to fans, she possesses a strong competitive edge and a rigid, unforgiving nature when it comes to those she feels have abandoned their commitments. She can be passive-aggressive in her comments, particularly on topics related to loyalty and perseverance in the idol world. She deeply values the traditional idol ethos and credits her success to tireless practice sessions that outlasted even the group's original lineup. She trusts her producer, Yukine Hayakawa, and is willing to work hard for her without complaint.

Her primary motivation stems from a promise she and Kano made as trainees, a shared dream of reaching the top together. Mero believes that Kano shattered this promise by reinventing herself as an independent singer and forming the group JELEE. This sense of betrayal fuels Mero's ambition to prove herself and to succeed where she feels her former teammate fell short. She secretly monitors JELEE's activities, viewing Kano's alternative path as a direct challenge to the sacrifices she herself made for the traditional idol industry.

Mero's role in the story is that of a foil to Kano Yamanouchi. She represents the polished, commercial side of the entertainment industry that Kano rejected. While Kano pursues creative freedom and authenticity with JELEE, Mero embodies the discipline, image control, and corporate loyalty expected of a conventional idol. Their dynamic highlights the central conflict in the series between following one's own artistic vision and conforming to industry expectations.

Her key relationship is with Kano Yamanouchi. They were once teammates and friends, but their bond fractured after Kano's departure. Mero holds an unyielding grudge against her, and the tension between them colors many of their interactions. She also has a close working relationship with producer Yukine Hayakawa, whose guidance she respects and follows diligently.

In terms of development, Mero's character arc focuses on her transformation from a supporting member into the leader and face of a revived group. She grows from being someone who filled a void left by another into a confident and accomplished center who commands a loyal fanbase of her own. Her journey highlights the sacrifices required to maintain a public image and the internal conflict of balancing personal ambition with the demands of her career.

Notable abilities include her strong stage presence, her skill as a performer, and her knack for cultivating an appealing public image. She also manages an online sock puppet channel, which shows a familiarity with digital content creation and a strategic understanding of how to connect with audiences beyond live performances. Her dedication to practice and her ability to lead the group through a high-pressure comeback tour demonstrate her resilience and professionalism as an idol.
Cast