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Elena (アリーナ)
Elena is the lead female character of TO - Symbiotic Planet. Elena is working as an interpreter for United Eurasia Research Facility in the planet which has the possibility to become a new colony for mankind. She has been secretly meeting with Aon, a researcher from the US-Euro Research Facility, a rival facility of her own research facility. She is also the daughter of the Head of United Eurasia Research Facility.