Deici is Number 10 and came online around the same time as Sein, which puts Numbers 1 through 6 ahead of her in the ranks. She's the quiet type—doesn't show much emotion on the surface, even though she genuinely cares about her sisters. Around Nove and the younger numbers especially, she keeps things professional and distant. That said, she's noticeably more relaxed with Quattro, even opening up a bit despite thinking some of Quattro's quirks are kind of pointless. When it comes to orders, Deici follows through without question, even when she has personal doubts. That said, she's not a machine about it—she can feel sympathy for people she sees as innocent bystanders caught up in whatever's happening.
Content compiled by AnimeList.moe from publicly available sources.
