eccentric
ik-SEN-trikadjMeaning odd in behavior in a harmless, quirky way
Memory hook EC-CENTRIC: a little OFF-CENTER. Professor Edwin wears a wizard hat to the park and walks his turtle on a leash. He is a bit off-center but perfectly harmless: eccentric.
The eccentric inventor wore one red sock and one green sock every day.
In context The neighbors thought old Mr. Pell was eccentric, since he walked his pet turtle on a leash, but they also thought he was the kindest man on the street.
Similar quirky, odd, offbeat, zany
Opposite conventional, ordinary, normal
From Greek ekkentros, “out of the center”: ek (out of) + kentron (center). It first described orbits that were off-center.