Learn how to complete Little Researcher I in Duet Night Abyss, meet Theo, choose dialogue wisely, and earn valuable progression rewards.

Little Researcher I in Duet Night Abyss is a side quest that starts with Theo, a young researcher conducting surveys in Icelake. Before starting this side story, you need to finish the Crystallo of Stella main quest. Once you complete it, make your way to the Eastern District in Icelake. Theo will be waiting near the tunnel entrance that connects to Suburban Square. The area is easy to recognize, as it is a passage between the two main zones.
When you approach Theo, he will greet you and start asking questions. This marks the beginning of the Little Researcher I quest. The entire interaction happens through dialogue, so there is no combat or exploration required. Still, pay attention to the questions, since your answers decide how your Impression stats evolve.
How To Complete Little Researcher I in Duet Night Abyss

Theo will begin his survey, asking a few questions about your thoughts and personality. Every response adds points to a specific Impression type, so it is worth paying attention to what you pick.
Here is a breakdown of how the responses affect your stats:
- If you comment on his uniform and act observant, you earn Wisdom points.
- If you ask whether there is any reward for helping, you gain Benefit points.
- Giving a dramatic introduction, like calling yourself the Flame of Rebirth, adds Chaos points.
- Being polite but direct gives a smaller boost to Chaos as well.
- If you tell him you feel uncomfortable with his questions, you raise your Empathy stat.
- Saying that extra questions will cost him boosts Benefit again.
Each of these responses ties into a personality style. For example, Benefit suits players who like collecting rewards, while Empathy fits those who prefer kind choices. The good thing is that no option locks you out of future quests, so you can experiment freely.
Once you finish Theo’s short survey, the quest ends automatically.
Little Researcher I Side Quest Rewards
When you complete Little Researcher I, you receive several helpful items that support your progress:
- 200 Coins
- 1 d10
- 100 Carmine Globules
- 1 Weapon Manual III

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