skirt, long robe for women, having no sleeves and fasten down the front
帔 centers on a specific type of traditional women's garment: a long, sleeveless robe that fastens down the front, essentially a skirt-like outer layer.
帔 combines 巾 (cloth) with 皮, which likely contributes the sound. The character refers to a cloth garment, consistent with the 巾 component.
The left side 巾 is a cloth, and the right side 皮 suggests a covering like skin. Picture a long cloth robe that wraps around the body like a second skin, fastening down the front.
For ヒ, imagine a woman wearing this robe saying 'Hee!' in delight at how elegant it looks: Hee -> ヒ.