勇者: a hero / 優者: an excellent person, an outstanding person

有料: charging fees

左右一対: symmetrical pair, left and right pair

左右相称: symmetry

左右対称: bilateral symmetry

dusk

(dialect) sour

(originally Kyūshū) Synonym of こい (koi, “deep; strong; dense”)

nine

nine / 究: an indeterminate large number, a myriad, a great many / (divination) the number of yang, in opposition to 六 (roku, “six”) as the number of yin