Sayotsugu

Sayotsugu is the femslash ship between Sayo Hikawa and Tsugumi Hazawa from the BanG Dream! fandom.

Fanon
Despite not having much canon content outside of the "Cooking Class Craziness!" event, Sayotsugu is still one of the most popular ships among fans. This may be due to the fact that both characters come from 5-member bands where the other 4 are often paired up (those being MocaRan, TomoHima, YukiLisa, AkoRinko), so naturally, fans became curious about their interactions as the "odd-ones-out" of the groups. Fans were surprised by their unexpectedly warm and harmonious dynamic that was first introduced in the "Cooking Class Craziness!" event— this is also a big contributing factor to Sayotsugu's popularity, given that Sayo is not one to open up easily.

While this ship was originally considered something of a running gag in fandom due to little character interaction, it has subsequently received some attention from Bushi both as a desire to tease popular pairing and some of their attempts to divert fans' attention away from romantic shipping SayoHina due to its incestuous nature. For example, this ship was teased by Saechi (Tae's seiyuu) when Sayo's seiyuu, KudoHaru, chose Tsugumi as the one she would like to marry amongst all other Garupa characters in one of the episodes of the live show. Since then, starting in 2019, this ship has consistently received some in-game attention, either emphasizing the characters' friendly casual interactions or their positive mention of each other in dialogue.

Since, for one reason or another, Tsugumi also began to get noticeable interactions with Sayo's sister, Hina, or even both twins together, a certain part of the fanbase has become ship all three as a poly ship or a joke love sibling love triangle. This pairing received attention from Bushi as well. So, in one of the events, one of the girls mentions that Tsumugi "has a special effect on Hikawa twins".

As of 2022, Sayotsugu is the most written BanG Dream! ship on AO3. The ship is often rivaled by other popular Sayo ships, such as SayoLisa and SayoHina. SayoTsugu fans' rivalry with the latter is especially infamous, as both ships are the most popular ships for Sayo and one of the most popular ships in fandom in general. Thus, SayoHina fans often accuse fans of the latter of being toxic and overestimating the potential of their ship, while SayoTsugu fans accuse them of promoting incest and sexualizing the twins' relationship.

Fandom
FAN FICTION

PIXIV
 * さよつぐ posts on Pixiv

Trivia

 * The pair is often compared to mint chocolate because of their hair colors.
 * Sayo is 161cm tall while Tsugumi is 156cm.
 * Upon their first notable interaction, Sayo addressed Tsugumi by "Hazawa-san", but a more recent area conversation shows her addressing Tsugumi by her first name and the -san honorific instead.
 * Sayotsugu's alternate ship name "342g" is a play on words with their names (3 - "Sa", 4 - "Yo", 2 - "Tsu", g - "Gu").
 * BanG Dream's first Kirameki Festival Gacha features an animation of Sayo and Tsugumi in one card.