obl
Oblivion

obo
Oborogumo_Takamitsu

obs
Obstagoon

oca
Ocarina_of_Time

och
Ochaco_Uraraka

oct
Octarian Octavia_Goetia Octavia_Melody Octoling octoling_boy Octoling_Girl

oda
Oda_Koziki Odalia_Blight

odd
Oddrich

odi
Odin_Sphere

off
Off_the_Hook Officer_Jenny

ogr
ogre

oh_
Oh_My_Goddess!

oi
Oi

oja
Ojamajo_Doremi

ok_
OK_K.O.!_Let's_Be_Heroes

oka
Okami

oki
okinaika

ole
Oleana

oli
Oliver_and_Company Olivia Olivier_Milla_Armstrong

ome
Omega_Strikers

omn
Omni-Man

omo
Omori

one
One-Punch_Man One_Direction One_Piece

oni
Oni Oni_(artist)

onl
Online_Superheroes

onm
Onmyou_Taisenki

ono
Onomeshin

onp
Onpu_Segawa

onw
Onward

ool
Oola Oolong

ooo
OOOP

ooz
OozutsuCannon

opa
Opal

oph
Ophelia

opt
Optimus_Prime OptionalTypo

ora
Orange-PEEL

orc
orc

ore
Oreteki

ori
Orihime_Inoue Orisa

os-
OS-tan

osa
Osakabehime

osc
Oscar_Pine

osh
Oshi_no_Ko Oshiro_Project

osi
OSIIMI

ota
ota otake2137 Otarlette

ott
ottsel

oui
Oui_Katsushika

oum
Oum_Boonchuy

our
Ouro_Kronii

out
Outlaw_Star

ove
Over_the_Hedge Overlook Overlord

owa
Owain

owl
owl_pie

oys
OysterCatcher7