| Status | Name | Position | Date Registered | Posts | |
|---|---|---|---|---|---|
| Unruly | 2013-07-08 | 1 | |||
| unsafe gun | 2015-04-28 | 0 | |||
| unSaint Saturn | 2016-01-16 | 0 | |||
| UNSC Pony | 2012-12-03 | 0 | |||
| Unsc123 | 2017-09-13 | 0 | |||
| UnscrewedCustodian | 2023-11-10 | 0 | |||
| Unseen | 2020-03-31 | 0 | |||
| UnseenEden | 2022-01-01 | 0 | |||
| Unshaken_Productions | 2019-09-15 | 0 | |||
| UnsignedInteger | 2015-01-26 | 0 | |||
| UnsinkableSam | 2012-09-28 | 0 | |||
| unsnaggedmouse2 | 2016-06-05 | 0 | |||
| UnsnappedTag | 2013-06-10 | 0 | |||
| Unsolved_Mystery | 2014-08-10 | 0 | |||
| Unstable Grin | 2013-07-06 | 0 | |||
| Unstable Mystery | 2015-04-12 | 0 | |||
| Unstable Sun | 2015-01-22 | 0 | |||
| UnstableBread | 2023-03-25 | 0 | |||
| UnstableBrony | 2013-07-08 | 0 | |||
| Unstackable | 2022-05-27 | 0 | |||
| Unstoppable | 2014-10-20 | 12 | |||
| unstoppable-bookworm | 2013-07-09 | 0 | |||
| UnstoppableRemix | 2014-08-09 | 0 | |||
| unsurbtots | 2019-10-04 | 0 | |||
| Unsuspicious | 2014-01-24 | 0 | |||
| unsweetened | 2020-02-22 | 0 | |||
| Untailygean | 2013-07-08 | 0 | |||
| Untalkative Bee | 2016-07-29 | 0 | |||
| UntamedFirecetalon | 2014-06-23 | 0 | |||
| untamedfirecetalonn | 2014-08-08 | 0 | |||