The girls all have brown eyes and brown hair tied back from their faces with hair scrunchies, along with a prominent blush on their cheeks. They have round, pudgy faces with small eyes and slanted eyebrows that resemble their father's. They almost always wear matching but differently-colored outfits, which usually consist of hooded vests, gloves, black long-sleeved shirts, black skirts, black tights and sneakers.
Though they look very similar, they each have a distinguishing point: Axel has pigtails and her color is purple, Lutz has a bun and her color is light blue, and Loop has a ponytail and her color is pink.
The triplets are very passionate about figure skating like their parents. They often stay up late to post on social media or watch competitions, much to the chagrin of their mother, who scolds them for doing so. They are helpful in offering to explain the Grand Prix circuit and assignments to Yuuri's parents (also indirectly explaining to the audience), due to their knowledge and interest in the sport.
The triplets are often shown to be quite intelligent for their age; along with being very knowledgeable about figure skating, they are skilled at using electronics such as smartphones and video cameras, and were the ones to organize the "Hot Springs on Ice" event in Episode 3. They are also very mischievous, secretly recording Yuuri's (and later, Victor's) skating, as well as personal life.
Takeshi is the father of the triplets. The triplets resemble Takeshi in physique.
Yuuko is the mother of the triplets. The triplets have Yuuko's hair and eye color. Yuuko constantly has to scold her daughters for using her online account without permission or whenever they stay up late to watch figure skating, but her efforts to control the triplets' antics are rarely successful. Yuuko sometimes even joins in on the triplets' excitement over anything to do with figure skating, and it is likely that she was the one who induced their love for the sport.
Yuuri has known the triplets since they were born, but is not shown to be very close to them. The triplets are very casual in addressing Yuuri although he is much older than them. The triplets are huge fans of Yuuri and like to update their social media with things concerning Yuuri, be it his skating or his personal life.
The triplets and Minako are seen to have a decently close relationship, planning the "Hot Springs on Ice" together and celebrating in a dance when putting up posters. They sit with her in the stands during the event.
In Episode 10, the triplets and Kenjirou form a cheer squad so they can cheer Yuuri on as he competes in the Grand Prix Finals. They watch the finals together at Yu-topia Katsuki, along with the triplets' parents and Yuuri's family.
- "You really got fat!" - Axel on Yuuri's weight
- "Are you really retiring?" - Loop
- "You never had a girlfriend?" - Lutz
- “But all the skater otaku will love it.” - Lutz (about the video of Yuuri's rendition of Stay Close to Me)
- "Will you let us organize the event? A face-off between Yuri of Russia and Yuuri of Japan! Let's throw...a huge party!" - Axel (about the "Hot Springs on Ice" event)
- "That flip had enough rotations, right?" - Lutz (on Yuuri's GPF short program Quad Flip)
- Each of the triplets are named after a type of figure skating jump (the Axel jump, the Lutz jump, and the Loop jump). The Axel and Lutz were named after their creators, and only the Loop is a toe jump.
- Their instagram is sukeota3sisters. "Sukeota" is short for "skating otaku".
- Their phone case features Victor Nikiforov, with the Russian flag as a backdrop. They made the phone case themselves.
- Each of them has an assigned task when posting to social media: one takes videos, one takes pictures and one uploads.