Tags
| Name ▲ | Type | Count |
| user (character) | Character | 5 |
| user (rodent powered) | Character | 3 |
| usererror | Artist | 7 |
| username-password | Artist | 56 |
| username666 | Copyright | 1 |
| username (character) | Character | 6 |
| uses | General | 1 |
| usethebrakes | Artist | 1 |
| ushimaru477 | Artist | 36 |
| ushio amano (akino-kamihara) | Character | 1 |
| ushioppoi | Artist | 1 |
| usikuma | Artist | 1 |
| usm-mik | Artist | 1 |
| usnarbit | Artist | 1 |
| usopp | Character | 2 |
| usssar12 | Artist | 57 |
| ussuri the alpha ursaluna | Character | 1 |
| usually | Artist | 1 |
| usuke4649ne | Artist | 1 |
| usura | Artist | 8 |
| usury40 | Artist | 36 |
| uta (picco) | Character | 4 |
| utachinaru123 | Artist | 1 |
| utamu d28 | Artist | 1 |
| utau | Copyright | 2 |
| utdblack | Artist | 14 |
| uterus | General | 1 |
| utility pole | General | 1 |
| utopianvee | Artist | 526 |
| utopiarayzexal | Artist | 1 |
| utou | Artist | 3 |
| utsu joutai | Artist | 1 |
| utsubuse | Artist | 3 |
| utsuki maito | Artist | 9 |
| utsuo-kami | Artist | 17 |
| utterangle | Artist | 36 |
| uturnwolf | Artist | 1 |
| utx-shapeshifter | Artist | 24 |
| uuforya | Artist | 1 |
| uuoouu | Artist | 3 |
| uuu | Artist | 3 |
| uuu (twitter) | Artist | 1 |
| uvfox | Artist | 2 |
| uwaxaa | Artist | 5 |
| uwdennis | Artist | 1 |
| uwotinfokm8 | Artist | 1 |
| uwseir (isolatedartest) | Character | 6 |
| uwuchan14 | Artist | 1 |
| uxdragon | Artist | 24 |
| uxie | Species | 332 |