As we know, there is a class of adjectives that end in 〜らか: 滑【なめ】らか, 明【あき】らか, 清【きよ】らか, 安【やす】らか, etc. やわらか (柔らか or 軟らか) is also in this class of adjectives. However, it can also be written as the ...
I found this adjective from 7!!'s song 「ラヴァーズ」(Lovers): 無邪気なる Dictionary entries categorises 無邪気 as a noun and な-adjective. For reference, I shall extract parts from two different stanzas in ...