Quattro wasn't the nicest person in canon, either - she'd probably need some special attention from Usagi alongside Jail and Due. That said, if she's in her "cutesy" personality mode all the time, Soskue and the Xia twins would either go crazy or learn how to relax. (Chidori would lament the fact that "there's two of them now" - Quattro and Minako. Of course, Chidori's been wrong before.)
As for Vivio, here's one possibility. As in canon, Jail &co. discover the whereabouts of the Cradle, and discover that only the Saint Kaiser can operate it. Unlike in canon, he approaches Zeke &co. and asks whether he has any ideas. Much discussion takes place (off-screen, because it's boring), and Seto decides it's worth cloning the SK in order to have something this powerful in the Jurayian fleet. (Lum is not amused when she finds out.) Somebody points out that cloning an adult and giving her all of her old memories would result in her having a massive case of culture shock, and somebody else proposes cloning her as a child. Zeke of course suggests the name Vivio. Mind you, the timing is off, so Fate gets an adopted sister instead of an adopted daughter.
--
Rob Kelk
"Governments have no right to question the loyalty of those who oppose
them. Adversaries remain citizens of the same state, common subjects of
the same sovereign, servants of the same law."
- Michael Ignatieff, addressing Stanford University in 2012
As for Vivio, here's one possibility. As in canon, Jail &co. discover the whereabouts of the Cradle, and discover that only the Saint Kaiser can operate it. Unlike in canon, he approaches Zeke &co. and asks whether he has any ideas. Much discussion takes place (off-screen, because it's boring), and Seto decides it's worth cloning the SK in order to have something this powerful in the Jurayian fleet. (Lum is not amused when she finds out.) Somebody points out that cloning an adult and giving her all of her old memories would result in her having a massive case of culture shock, and somebody else proposes cloning her as a child. Zeke of course suggests the name Vivio. Mind you, the timing is off, so Fate gets an adopted sister instead of an adopted daughter.
--
Rob Kelk
"Governments have no right to question the loyalty of those who oppose
them. Adversaries remain citizens of the same state, common subjects of
the same sovereign, servants of the same law."
- Michael Ignatieff, addressing Stanford University in 2012