Located in the Library's Menu, here you can check in order the Sidians you have acquired. Inside the game, you will notice three red little spheres, which will tell you how many forms of the Sidian you have unlocked. For more details about forms, click here.
You can view the album in this default mode or also in the sort-able list mode:
In addition, Ookami kun shared this Spreadsheet Document if you wanna do a quick check of the servants. Special thanks to Kurobara who made the original/base one.
Cards with missing info Edit
We made a category for the card that have missing info, marking them as Incomplete, so if you see a card that needs info and doesn't have the category tag, please add it.
For sidians that are not released in the global server, see Category:Not Released
Additionally, you can check our Sid Story Wiki:To-do list; there we have a list of the cards that have no number/icon.