(a.k.a Compendium) Can be accessed from the Main Menu or from the Base. Scrapbook's Main function is to view Data and Illustrations of unit Players unlocked and to receive Tuna Cans by collecting Units belonging to the same group.
Unit Info[]
By tapping on a Unit's Icon, you can open that Unit's Info Page. This is where various Info about Units, their Introduction, Voices and Illustration. You can also see all of unit skins here, even those that is locked and grayed-out in Unit Details Page and their respective unique Voices (You still can't interact with them).
NOTE: The stats chart shown here is for lore purpose, showcasing their capabilities in story. It does not provide any real information about their capabilities in terms of gameplay.
However, if the Unit is not unlocked (a copy of her has never been acquired), data will be locked and the illustrations will be blackened instead.
Unit Collection[]
Located in the Groups tab of the Scrapbook, you can get Tuna Cans by collecting Units belonging to the same group (The Units are NOT removed to complete this). For KR, each Group has a required number to collect and the Tuna Cans reward is equal to the required number multiplied by 2, once for each group. However, unlike KR, JP has the rewards separated for each Unit in the group, each collected Unit will grant 2 Tuna Cans individually.
NOTE: For KR, the rewards are only dependent on the required number, not the collected number. For example, Project Battle Maid need 3 Units to complete, therefore the reward is 6 Tuna Cans even if you managed to collect all 5 members.
NOTE: Some Groups might have similar Icon and Names as they belong to the same Faction. However, units in a group will only count toward their group, even if other group share the same Icon.