Through this collab, 'Heidelloon', an Outer One character from The War of Genesis, has arrived in Uncharted Waters Origin as a new Admiral. 'Heidelloon' is a Grade S Admiral specialized in Combat and Artillery and is being released as a standalone addition without an accompanying Admiral Chronicle. Previously featured The War of Genesis collab Admirals, Mates, and their exclusive Gear have also been brought back. The returning Admirals are 'Black Prince' and 'Iyolin Pandragon', while the returning Mates include 'G.S', 'Robin', 'Karls', 'Koon', 'Ophelia', 'Sara', 'Crow', 'Haya Belle', 'Kaja', and 'Elizabeth'. The free Mate 'Calix' has also been added. 'Calix' is a Grade S Mate specialized in Trade content, equipped with a variety of abilities that help facilitate efficient trading. A new 'Relationship Chronicle' has been added as well. This installment stars the Mate 'Aurélie', and players can enjoy a story featuring the narratives of related Mates, including 'Calix', 'Linus Rachet', and 'Chevalier Rum', while earning exclusive Gear rewards.