guileless

She gave him a guileless look, but he knew he couldn’t really trust her.

她朝诚恳地看了一眼，但是不能真正地相信她。

She was the blue-eyed, black-haired gamine whose voice and guileless charm had been the key to Human victory in the Robotech War.

她是个蓝色眼睛，黑色头发淘气女孩，她歌声和不加修饰魅力是第一次宇宙大战中引领类走向胜利关键。