Most smart devices are engineered to obey instantly: you speak a wake word, and an assistant answers in milliseconds. Yet when Tokyo-based Yukai Engineering designed Mirumi, they chose the opposite path—building a fluffy, long-armed companion robot that reacts to head petting and nearby sounds with unhurried head turns and deliberate pauses.
Disclosure & scope: Published by mirumirobot.com (seller of Mirumi Ivory, Pink, and Gray). Design references below cite Yukai Engineering's published Japanese development notes and US FAQ (checked October 2026).
1. Three Documented Design Choices Behind Mirumi's Personality
- Tuned speed changes and pauses: Yukai Engineering's design account explains that engineers crafted multiple movement patterns and specifically tuned both speed shifts and pauses between movements (source). The US FAQ likewise advises allowing time for a response after petting its head (source).
- Sound & touch without speech recognition: Per the US FAQ, Mirumi has neither AI nor language recognition (source). Because it never speaks a scripted sentence, each head turn invites you to notice its physical posture rather than grade a chatbot reply.
- Wrap-around arms built for ~10–15 mm straps: By clinging to a tote handle or backpack strap (~10–15 mm diameter recommended in the US FAQ) at just ~155 g (US Gray spec), Mirumi peeks out from your bag like a curious passenger.
2. Choose the Finish That Fits Your Everyday Carry
All three models feature custom Japanese fur (non-removable and not washable per the US FAQ) and USB-C recharging with no app required. Compare Mirumi Robot Ivory, Mirumi Robot Pink, and Mirumi Robot Gray.