A photographer who works alongside Ran and used to work with Souma Rena. Sera turns out the be Ran's "stalker" but it turns out all she wanted to do was talk to Ran; Julia drop kicks her assuming that she wanted to attack Ran when all Sera was doing was reaching for her business card. She eventually becomes closer to the idols and starts to photograph Ran. Eventually, she and Ran become confidantes. Sera realises that Ran is very much in love with Julia despite the younger girl having no clue. Ironically, she has no idea that her strained relationship with Rena is a result of unspoken their love for one another. Sera eventually ends up dating Rena after they reconcile.