These rabbit emojis on the other hand use slashes to make hanging straight down sort of ears.

Straight Down Ears
／(･ × ･)＼／(^ x ^)＼／(^ x ^=)＼
／(=๏ x ๏=)＼／(=´x`=)＼／(=∵=)＼
／(=⌒x⌒=)＼／(=✪ x ✪=)＼／(≡・ x ・≡)＼
／(≧ x ≦)＼／(v x v)＼／(=∵=)＼
／(≡・ x ・≡)＼/ (,,๏ ⋏ ๏,,)＼／(￫ x ◕=)＼
／(◕ x < )＼／(◕ x ≦ )＼/ (ㅇㅅㅇ❀)＼
/ (•ㅅ•)＼/ (´･×･`)＼/ (,,Ő ｘ Ő,,)＼
/ (⁎˃ᆺ˂)＼/ (´・×・｀)＼/ (╹ૅ×╹ૅ)＼
/ ( ÒㅅÓ)＼/ (⁎˃ᆺ˂)＼/ ( ´•̥ו̥` )＼