Fun Fact: Rui is the only Project Sekai character whose full name can be spelled out by element symbols

KAmISHIrO RuI

Maybe you can include SHIHo HINoMoLi too if you treat R and L the same as it is done in Japanese

The ones that miss it by one letter are:

(a)IrI MoMoI,

ICHIK(a) HoSHINo,

SHI(z)UKU HINoMoLi,*

HArUK(a) KIrITaNI,

(a)N SHIRaISHI,

NeNe KUS(a)NAgI

Quite fitting for the backstage alchemist to be the only one whose name can be spelled by elemental symbols right? And not only that, ruthenium triiodide (RuI3) is an actual chemical compound! So Rui, with the right equipment, can make some RuI3!