The Number Summonoids

El-even, Ni-ine, E-eight, Se-even, Si-ix, Fi-ive, Fo-ur, Three-ee, Callie*, and Yunita, also known as the Number Summonoids, are a team of summonoids made to help Linette bring Summonoidia back to Summonia.

Story
Right after Aveline was born, a summonoid version of him/her, known as E-eight, was made. Almost 13 years after that, Portal, Jacquette, Ilia, Bathsua, Zania, Avelin, and Yunita make summonoid versions of themselves. They also make another summonoid, known as Si-ix.

Right after the Number Summonoids are made, E-eight goes along with them, and becomes a member of their team. S/he and the Number Summonoids then stay at the Summotel. 3 years later, Callie, while pretending to help Summonine, goes to the Summotel. She becomes friends with Pania and the Number Summonoids, and decides to help them out. Callie becomes a member of their team.

One day, Three-ee, E-eight, Fo-ur, and Se-even are captured by the Donutbot and brought to Cakevillage. Yunita then decides to find ways to distract the Donutbot, while El-even, Ni-ine, Si-ix, and Fi-ive, along with Fi-fifteen, sail to Cakevillage. Callie decides to stay at the Summotel and wait for the others to save Fo-ur and Se-even.

However, when Fi-fifteen, El-even, Ni-ine, Si-ix, and Fi-ive are about to go to their ship, Callie changes her mind and decides to go with them. Before they are able to make their ship move, Systelis manages to capture Fi-fifteen, Ni-ine, and Si-ix. Fortunately, El-even, Fi-ive, and Callie manage to escape back to the Summotel. Callie saves Fi-fifteen and the captured summonoids. Callie, Fi-ive, and El-even then decide to stay at the Summotel while Fi-fifteen, Ni-ine, and Si-ix sail to Cakevillage and save Fo-ur and Se-even.

The Number Summonoids, except Callie, aren't seen for the rest of the story after that, but after some time, Yunita manages to find a way to distract the Donutbot. In the "Serendipity Breaks Free" ending, Ni-ine and Se-even, along with Fi-fifteen, help bring the summonoidized Villagerians back to normal.