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: | Enemies: | Resources and items: |
| Excalibur (Prime) | (Shadow) Stalker | Kuria |
| Ember (Prime) | Grustrag Three | Kubrow |
| Rhino Prime | Rathuum Executioners | |
| Mag Prime | Index Brokers | |
| Tusk Grineer | ||
| Ghouls | ||
| Terra Corpus | ||
| Amalgams |
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