Another type of character that makes great rabbit ears is ⌒.

Rounded Ears
⌒(・x・)⌒⌒(。・.・。)⌒⌒(=・ x ・=)⌒
⌒(=๏ x ๏=)⌒⌒(=・ x ・=)⌒⌒(=✪ x ✪=)⌒
⌒(=⌒x⌒=)⌒⌒(≡・ x ・≡)⌒⌒(≧ x ≦)⌒
⌒(=∵=)⌒⌒(,,๏ ⋏ ๏,,)⌒⌒ (⁎˃ᆺ˂)⌒
⌒(╹ૅ×╹ૅ)⌒⌒( ÒㅅÓ)⌒⌒(ㅇㅅㅇ❀)⌒
⌒(•ㅅ•)⌒⌒(,,Ő x Ő,,)⌒⌒( ´•̥ו̥` )⌒