Also known as Josiah, SA-150 is one of A-150’s types of young. SA-150 appears identical to its parent (both being floating faces comprised of two eyes and a mouth, with an antenna on each eye), but blue (rather than its parents aquamarine tone) and having anhedonia (which it’s parent usually lacks). It resides within the Rooms with its parent, specifically in the Apartments (or A Section). Not much else is known about it. Notably, however, it can instakill people it’s with.