Shittim

The Shittim Chest is a significant and mysterious artifact in Blue Archive. It was left behind by the former General Student Council President after her sudden disappearance, and it is rumored that the answer to its secrets lies with the Sensei. Resembling a computer tablet, the chest houses the advanced AI operating system Arona, and later, Plana from another timeline. It was given to the Sensei by the General Student Council's vice president, Rin Nanagami, and activated after the Sensei entered the password, "We thirst for the seven wailings. We bear the koan of Jericho." The chest grants access to the Sanctum Tower and gives control to the General Student Council, allowing them to address various issues in Kivotos. Additionally, there's a damaged but similarly functioning Shittim Chest belonging to Phrenapates, with an OS named A.R.O.N.A and a slightly different password: "We long for the wailing of Jericho. We bear the seven koans." The Shittim Chest plays a crucial role in the game, and the secrets it holds are yet to be fully revealed.