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

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

Characters

jessica_rabbit
jessica_vega
jessica_young_melis
jessica_(fejess96)
jessica_elwood_(character)
jessica_ainsley
jessica_(arknights)
jessica_(bae)
jessica_(bcb)
jessicanyuchi
jessica_whiteclawz
jessica_albert
jessica_(aj_the_flygon)
jessica_(housepets!)
jessica_(extremexworld)
jessica_valerie_(nightfaux)
jessica_(eradragon)
jessica_hubbard
jessica_reiland
jessica_jack
jessica_(coaster14)
jessica_(bigdon1992)
jessica_rose_(kibainuzuka945)
jessica_(syn-6)
jessica_the_jackal
jessica_foster_(zenallen)
jessica_(bboyhunter)
jessica_(jay_naylor)
jessica_(silverleaf455)
jessica_de_alkirk
jessica_wolf
jessica_the_weaver
jessica_(photolol.03)
jessica_bloodteeth
jessica_dee
jessica_koopa
jessica_(arthur)
jessica_ingmann
jessica_becker

Artists

jessica_willard
jessicarae

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