| Name | Level | Stat | Type |
|---|---|---|---|
| Underling | 57 | SPD +16 | Conversations |
| Underline | 100 | SPD +16 | Conversations |
| Underestimated | 130 | Max HP +40 | Enemy Kills |
| Underestimated | 100 | Max HP +40 | Enemy Kills |
| Undercurrent | - | - | Treasure Hunter |
| Undercover | 48 | Max HP +40 | Enemy Kills |
| Under-Repaired | 85 | ATK +8 | Enemy Kills |
| Under the sunshine | 10 | - | Other |
| Under the red leaves. | 10 | - | Other |
| Under the Blue Moon | 10 | - | Other |
| Under Yue | 50 | - | Main Quests |
| Under Trena | 50 | - | Main Quests |
| Under Star Ken | 50 | - | Main Quests |
| Under Sir Chamantt | 50 | - | Main Quests |
| Under Sir Campbell's | 50 | - | Main Quests |
| Under Nagawin | 50 | - | Main Quests |
| Under Naga Liya | 50 | - | Main Quests |
| Under Mystoge | 50 | - | Main Quests |
| Under Monteblot | 50 | - | Main Quests |
| Under Minyin | 50 | - | Main Quests |
| Under Grolain | 50 | - | Main Quests |
| Under Dick Milli | 50 | - | Main Quests |
| Under Control | 95 | SPD +16 | Enemy Kills |
| Undead King | 125 | DEF +4 | Enemy Kills |
| Undead King | 125 | DEF +4 | Enemy Kills |
| Unconventional | - | - | Crafting |
| Uncontrollable. | 20 | SPD +16 | Enemy Kills |
| Uncontrollable | - | - | Alchemy |
| Uncontrollable | 8 | ATK +8 | Enemy Kills |
| Uncontrollable | 93 | ATK +8 | Enemy Kills |
| Unconscious | 100 | Max HP +40 | Astral Adventures |
| Unconscious | 80 | Max HP +40 | Astral Adventures |
| Unclear | - | - | Farming |
| Unclean | 70 | Max HP +40 | Enemy Kills |
| Uncle Sausage | 75 | EVA +16 | Enemy Kills |
| Uncle Ben | - | - | Crafting |
| Uncle | - | - | Senshi |
| Unbridled Wild Horse | 68 | DEF +4 | Enemy Kills |
| Unbridled | 88 | EVA +16 | Enemy Kills |
| Unbending | 78 | ATK +8 | Enemy Kills |
| Unbending | 70 | Max HP +40 | Enemy Kills |
| Unbending | 88 | ATK +8 | Enemy Kills |
| Unbelievable. | - | - | Alchemy |
| Unbeaten | 18 | DEF +4 | Enemy Kills |
| Unbearable | 70 | DEF +4 | Enemy Kills |
| Unassertive | 40 | - | Astral Adventures |
| Unappetizing. | 101 | SPD +16 | Conversations |
| Unapologetic | - | - | Cooking |
| Unaffiliated | 55 | CRIT +4 | Enemy Kills |
| Unable to jump. | - | DEF +2 | Event |