ancient robe
裲 refers to an ancient type of robe or long outer garment. The meaning is narrow and specific to historical clothing.
裲 combines the clothing radical 衤 with 兩, which likely provides the sound. The character is used for a specific historical garment, but the exact origin of the compound is uncertain.
The left side 衤 is clothing, and the right side 兩 looks like a pair of hanging sleeves or a symmetrical robe. Picture an ancient robe with two long, matching sides.
For リョウ, imagine a historical robe worn by a character named Ryo: Ryo -> リョウ, and the robe is his signature ancient garment.