Affiliation: The Color Phrenapates is the Sensei from another timeline. More specifically, he is the Sensei who was killed by that timeline's Sunaookami Shiroko—Shiroko *Terror (Kuroko)—and subsequently corrupted by The Color. Although he is technically dead, he remains active; Arona's analysis shows his biological data matches Sensei's exactly, yet he shows no vital signs. As the Guide of The Color, he possesses a Shittim Chest identical to Sensei's, though it is cracked by a gunshot. He can activate it and, as its registered owner, utilize all its functions. Under the protection of the A.R.O.N.A installed within, he demonstrates the same abilities as Sensei: commanding students in battle and using Adult's Cards to empower them. Being the same person as Sensei, Phrenapates also possesses an Adult's Card. He is generally taciturn, speaking only when necessary.

Appears when the broken Shittim Chest held by Phrenapates is activated. Unlike the original Arona, she can manifest a physical form. This is possible because they are within the Ark of Atrahasis, where quantum superposition is maintained—specifically at the Throne of Naram-Sin, a realm where the non-existence of dimensions, time, and entities is not yet fixed. Phrenapates distorts the space to allow A.R.O.N.A to manifest. She possesses the same abilities as Arona, such as overwhelming Veritas students in electronic warfare and completely intercepting bullets fired at Phrenapates.

Taller and more mature in both physique and atmosphere than the original Shiroko. She stands at 165cm, 9cm taller than the original, and is 17 years old, a third-year student. While her basic features, hair, and halo are similar, she has long hair with an added cowlick. Her halo has changed color and cracked due to the influence of The Color, and the crosshair portion of its shape has become pointed. Shiroko *Terror reveals that she was the one who personally killed Sensei, and the being who awakened as the Guide of The Color afterward is the current Phrenapates. She plans to destroy the Kivotos of parallel worlds. Furthermore, she harbors a deep hatred for any Shiroko other than herself.