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== Trivia ==
* A cosplayer wearing the Blue Journey costume can be seen walking the expo ground during HoloExpo 2023 prior to the project announcement at the end of 4th Fes a day later.<ref>{{Cite web |url=https://x.com/achan_UGA/status/1636934354357350400 |title=A-chan on Twitter(X) |accessdate=2024-06-07 |author=[[Yuujin A]]|date=2023-03-18 |year=2023 |language=Japanese|quote=By the way...way… GetI thegot "Mysteriousa Cosplayphoto Girl"of photothe we“mysterious talkedcosplay aboutgirl” that was mentioned in hololive'sthe official men'sHololive members-only broadcast broadcast💡👀💡👀 If you are at the venue, please look for it🕵️it 🕵️(GooglTL)}}</ref> She was mentioned in a member-only stream on the official Hololive channel prior to the event which teased the existence of the then secret project. The cosplayer served as a teaser for the outfit which wouldn't be revealed until a few months later.<ref>{{Cite web |url=https://www.youtube.com/live/Ii-tNxnuWgc?si=ROfljofHEKOV4GdF |title=The full picture of Blue Journey is finally revealed!|accessdate=2024-06-07 |author=Hololive Official Youtube|date=2023-07-08 |year=2023 |language=Japanese}}</ref> <!--A link to a fan account with better picture (to upload or not?) https://x.com/yuuri_hanamaaru/status/1636916039186526209 -->
}}</ref> She was mentioned in a member-only stream on the official Hololive channel prior to the event which teased the existence of the then secret project. The cosplayer served as a teaser for the outfit which wouldn't be revealed until a few month later. <!--A link to a fan account with better picture (to upload or not?) https://x.com/yuuri_hanamaaru/status/1636916039186526209 -->
* Despite its name, Blue Journey primary color (used in its website, promo image and Mizutamari cover art) is more of a pinkish purple rather than blue.
== References ==
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