A cheerful girl and childhood friend of Croix's. She works as a Dive Therapist in Rakshek and is extremely knowledgeable in all matters related to Diving and Dive Therapy. She has a strange taste of cooking. Despite her cheerful exterior, she harbors many secrets that even Croix has no knowledge of. Luca's true name was the adopted name of her sister Leyka (aka Cloche Leythal Pastalia) but changed her named to Luca to cover up her identity after her biological mother Arshe was killed as a result of a conspiracy by Chancellor Alfman.
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