Although her name does not begin with an "I", the "Ai" from "Aiko" represents an "i" sound in Japanese, indirectly marking her as an "i." She is Gemini, quite ditzy, scatterbrained, and is prone to losing or misplacing her possessions, but is also very nice, kind, and unbelievably cheerful, even in bad situations. She also has an uncanny resemblance to Iori Yoshizuki, save for a mole under her left eye. Her close resemblance to Iori causes Seto some complications when she is introduced three-quarters of the way through the manga. She, as well as Seto, fall in love with one another at a later point after they meet. Asou realizes this is a potential problem for Seto and decides to move away in order to keep Seto's and Iori's love intact. One of the series' running gags is the odd similarities between the women who get in the way of Ichitaka being with Iori. Not only do they all have I names (or AI in the case of Aiko Asou), but they all appear very similar in appearance. Izumi looks like Iori when she has long hair and like Itsuki when she has cut it short. Aiko also looks like Iori but this time more of a near perfect double with the exception of a mole on her cheek.
Platoon captain of the 1121th squad. Tank commander. She is open-minded and tolerant, and she is a good older sister/mother figure to her unit members. She is usually gentle, but she can become strict at a moment's notice. Her former troop was killed on the battlefield. She was the only one left alive.
Kanata's senior trumpeter who gives her guidance. Her field is correspondence. She speaks in a strong-minded and curt manner, but she has a kind disposition. 17 years old. In episode 10, it is revealed she is actually a Helvetian princess and Iliya's half-sister.
Lena (Japanese: レナ Rena) is one of the characters of the day in A Jolting Switcheroo!. She and her younger sister Lyn were resting at the same Pokémon Center as Ash and his friends were, when Lyn's bag containing the Pichu she cares for got accidentally switched with Bonnie's bag containing Dedenne. As Lena and Lyn left and were walking down the street, Lyn noticed Dedenne was in her bag instead of Pichu. While Lena was talking with a friend, Lyn ran off to find Pichu. As she ended her conversation, Lena found out Lyn was gone, much to her worries. Meanwhile, Ash and and his friends were looking for Dedenne. Clemont came with the idea to use one of his inventions to lure Dedenne to them. The invention exploded however, but the explosion was noticed by Lena, who quickly rushed to the scene. There she found the group, and Pichu, much to her relief. The group then explained the situation to Lena, and Lena told them she suspected Dedenne was with her sister Lyn. Now searching for Lyn and Dedenne, the group and Lena eventually found them in a grape orchard, about to be attacked by wild Beedrill. Ash's Pikachu saved them in the nick of time, and Lena was reunited with Lyn. Then the group and Lyn and Lena decided to have dinner together. (Source: Bulbapedia)
Nami is a classmate of Ichitaka, Iori, Teratani, and others, and is generally the mood-maker of the group whenever they are all together on a trip, school project, etc. She is very energetic and cheerful and loves to express herself, though her tomboyish and carefree attitude can make others feel awkward at times. She comes from a very rich family, as it is evident halfway through the manga when the group comes over to her house to organize a group project. Some interpret her as a female pervert, since she has tried to get people to sleep together and has shown off her body numerous times.