The Tenno Codex contains entries of many individuals, enemy types, and objects, some with significant lore contributions. The most prominent are listed here.
| Warframes and weapons: | Unique enemies: | Enemy factions: | Resources and items: |
| Excalibur (Prime) | (Shadow) Stalker | Tusk Grineer | Kuria |
| Ember (Prime) | Grustrag Three | Ghouls | Kubrow |
| Rhino Prime | Rathuum Executioners | Terra Corpus | |
| Mag Prime | Index Brokers | Deimos Infested | |
| Vapos Corpus and Amalgams | |||
| Juno Corpus | |||
| Empyrean Grineer | |||
| Empyrean Corpus | |||
| Sentients |
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