▁Cl amp ▁found ▁her ▁to ▁be ▁so ▁" special " ▁that ▁she ▁alone ▁could ▁have ▁been ▁the ▁series ' ▁main ▁character . ▁However , ▁after ▁dec iding ▁it ▁would ▁be ▁more ▁entertain ing ▁to ▁have ▁a ▁character ▁who ▁would ▁be ▁interested ▁on ▁Y uk o ' s ▁past , ▁Cl amp ▁created ▁K imi hi ro ▁Wat anu ki . ▁They ▁compared ▁Y ū ko ▁and ▁Wat anu ki ▁with ▁D ora emon ▁and ▁Nob ita ▁N obi , ▁respectively , ▁from ▁the ▁m anga ▁series ▁D ora emon . ▁ ▁When ▁making ▁the ▁character ▁Cl amp ▁thought ▁three ▁patterns ▁of ▁conduct ▁for ▁her . ▁The ▁character ▁was ▁not ▁fully ▁decided ▁until ▁meeting ▁her ▁model . ▁When ▁meeting ▁the ▁beaut ician ▁that ▁made ▁the ▁artists ' ▁man ic ure , ▁it ▁was ▁decided ▁that ▁Y ū ko ▁would ▁have ▁the ▁beaut ician ' s ▁strong ▁person ality . ▁However , ▁there ▁are ▁no ▁physical ▁similar ities ▁between ▁Y ū ko ▁and ▁her ▁model . ▁The ▁artists ▁had ▁problems ▁in ▁design ing ▁the ▁character , ▁as ▁it ▁took ▁them ▁a ▁long ▁time ▁to ▁make ▁her ▁fa cial ▁expressions . ▁In ▁choosing ▁Say aka ▁Oh ara ▁as ▁Y ū ko ' s ▁Japanese ▁voice ▁actress , ▁Cl amp ▁made ▁a ▁research ▁to ▁find ▁a ▁voice ▁actress ▁who ▁was ▁not ▁heavily ▁associated ▁with ▁another ▁character . ▁In ▁the ▁English ▁dub bed ▁series , ▁she ▁is ▁vo iced ▁by ▁Col le en ▁Cl ink en be ard ▁in ▁English . ▁ ▁App ear ances ▁ ▁In ▁x