Haru = means "Spring" in Japanese. Gender Neutral, though mostly used for boys. for more feminine centric version, Haruka means "Spring Child"
Sora = means "Sky" in Japanese. Gender Neutral. also means "Conch Shell" in Korean
Tori = Japanese word for "Bird", it is mainly used inside names, like "Natori" (masc version "Natoru")
Hina = means "Baby Bird" in Japanese. Female