Research review based on manufacturer documentation; we have not independently tested Mirumi. For a younger child, start with our age-six STEM guide, age-eight STEM guide or screen-free technology guide.
What does Mirumi actually do?
Mirumi rides on a compatible bag strap using its arms. Its behavior is intentionally narrow. Yukai Engineering says it can notice sounds and sometimes turn toward them. It also responds to touch, including head patting. The goal is not productivity or education; it is to create a small, expressive interaction when the robot appears to notice the user or someone nearby.
Is Mirumi AI?
No. This is an important correction because Mirumi is often discussed alongside AI companion robots. Yukai Engineering’s U.S. FAQ explicitly says Mirumi is not equipped with AI and does not understand words. Its reactions come from sensors and programmed behaviors rather than a generative conversational model.
That means there is no open-ended chatbot to evaluate, no child conversation history to manage and no AI subscription to maintain. For families comparing connected companion devices, Mirumi belongs in a different risk and capability category.
Does Mirumi need an app, Wi-Fi or an account?
No app is required and there is nothing to connect for normal use. That makes setup materially simpler than app-dependent robot pets. You charge it, attach it to an appropriate bag strap and use the physical device.
U.S. price and availability: dated store check
On October 7, 2026, the official Gray Mirumi listing displayed $149.99 and “Sold out.” The listing title still described an October-shipping preorder; that title is not a delivery promise. Availability for other colors was not confirmed in this check. Verify the current store and checkout terms before ordering.
Mirumi battery life, size and charging
The official specifications list a rechargeable lithium-polymer battery, about eight hours of operating time on a full charge and about two hours of charging time. Mirumi is approximately 100 mm wide, 110 mm deep and 140 mm tall including its arms, with a listed weight of about 155 grams.
The manufacturer’s estimates are specifications, not results from our own battery test. Actual runtime can vary with use.
How do you charge Mirumi?
The official FAQ specifies a USB-A to USB-C cable, a 5V USB-A adapter rated at least 1A, and a charging port on the back. The cable is included; the adapter is not. It also permits a USB-C to USB-C cable with a 5V charger rated at least 1A. A red LED means charging and a green LED means fully charged. Follow the current instructions and stop using damaged charging equipment.
Age and safety: this is not a young-child toy
Yukai Engineering recommends Mirumi for users age 15 and above and says the product is not intended for use as a toy for young children. Small children should not use it unattended. That makes Mirumi a poor match for NextGenBabyPlay’s normal preschool and elementary-school Gift Finder paths even though the design may look child-friendly.
What Mirumi is good at
Strengths
- No AI, language recognition or open-ended chatbot
- No app, account or Wi-Fi setup for normal use
- Simple sound-and-touch reactions are easy to understand
- About eight hours of operating time per full charge
- Distinctive wearable design rather than another desktop robot
Tradeoffs
- $149.99 is expensive for a device with intentionally limited functions
- Official age guidance is 15+, so it is not a normal children’s toy recommendation
- Launch/preorder availability can change
- Long-term durability and owner-review depth are still less mature than established toy categories
Who should buy Mirumi?
Mirumi makes the most sense for a teen or adult who specifically wants an expressive bag accessory or small companion object and values the fact that it does not need an app or AI service. It is less compelling for someone who wants coding, educational content, conversation, games or a general-purpose robot.
Mirumi vs AI companion robots
Do not choose Mirumi expecting Miko-, Loona- or Moflin-style capabilities. Mirumi’s selling point is almost the opposite: fewer features, less setup and a narrow physical interaction loop. That can be a benefit for buyers who like the companion-robot aesthetic but do not want a microphone-driven conversational service, child account or recurring software dependency.
Mirumi questions answered
Is Mirumi an AI robot?
No. Yukai Engineering says Mirumi is not equipped with AI and does not understand words.
Does Mirumi need an app?
No. The current product needs no app and does not require a connected account for normal use.
How much is Mirumi in the U.S.?
The Gray listing displayed $149.99 and “Sold out” when checked October 7, 2026. Check the official store for other colors and current availability.
What age is Mirumi for?
The manufacturer recommends age 15+ and says Mirumi is not intended as a toy for young children.
How long does the battery last?
The official specification is approximately eight hours of use on a full charge, with about two hours to recharge.
Verdict
Mirumi is interesting because it refuses the usual “more AI is better” direction. It is a simple sensor-driven bag charm robot with no app and no language model. At $149.99, the value depends almost entirely on whether its personality and wearable design are worth the premium to the buyer. For young children, the manufacturer’s 15+ guidance makes the decision straightforward: choose an age-appropriate toy instead.