Secondary protagonist of [[SIGNALIS]].

The Gestalt pilot and officer of [[spacecraft|Penrose-512]]. After their ship crashlands on the frozen planet Leng, the [[Android|Replika]] [[Elster (signalis)|Elster]] goes in search of her through Sierpinski.

[Spoiler] It's eventually revealed that Ariane and [[Elster (signalis)|Elster]] are lovers, and that [[Elster (signalis)|Elster's]] search for Ariane is to fulfil an unknown promise the two of them previously made onboard the Penrose. 

It's additionally revealed that Ariane is bioresonant, and heavily implied that much of the games events and story are caused by her bioresonant abilities.