"Kiki" can refer to a number of characters, artists, and other things. Check the current list of kiki_* tags to see if there is a more specific one that fits what you are trying to tag.

In particular, kiki_(kds) is the right tag for the Kiki from Kiki's Delivery Service.

Some of the more popular tags from that list include...

Characters

• kiki_(animal_crossing)
• kiki_the_cyber_squirrel
• kiki_(jurassiczalar)
• kiki_(felino)
• kiki_(nekopumpkin)
• kiki_(miracle_star)
• kiki_(arachnymph)
• kiki_(helluva_boss)
• kiki_(kds)
• kiki_kalani
• kiki_(angstrom)
• kiki_(dragon_tales)
• kiki_(iwata)_kinta
• kiki_(kiki's_vacation)
• kiki_zafiro
• kiki_(monkaes)
• kiki_(brewheardt)
• kiki_(tahlian)
• kiki_(woodsie13)
• kiki_(study_partners)
• kiki_(little_twin_stars)
• kiki_(nedoiko)
• kiki_(nyta)
• kiki_(gato_roboto)

Artists

• kiki_(artist)

...but check the complete list if the one you want isn't listed here.