What This Figure Actually Is
Mirai Suenaga is a character from the anime series Blue Period, and Funko made a glow-in-the-dark variant that isn't widely distributed. Most people encounter this through resale marketplaces because it never came out in standard retail channels. The figure uses a photoluminescent vinyl formulation that absorbs light and emits a faint greenish glow in darkness. It's not LED-based. It's the same type of material used on novelty keychains from the 1990s, just applied to a mass-produced collectible. I've been tracking this specific variant for about two years now. The price movement started around early 2024 when a few resellers on eBay and Mercari began listing it at three to four times the original retail value. By mid-2025, consistent listings were sitting in the $180 to $300 range depending on condition. The recent spike appears tied to renewed interest in Blue Period following a second season announcement, but supply hasn't moved at all. It's the same boxed inventory that's been sitting in warehouse bins since the initial release window closed. The glow effect itself is straightforward but has a few quirks worth knowing. The vinyl needs direct exposure to a light source for at least five to ten minutes to charge properly. Leave it in a dim room and the effect will be barely noticeable. I use a standard 60-watt equivalent LED bulb held about six inches from the figure for ten minutes, which gives a solid charge that lasts roughly forty-five to sixty minutes in a completely dark environment. Direct sunlight actually degrades the photoluminescent particles over time, so don't leave it on a windowsill expecting it to stay vibrant. Mine faded noticeably after about eight months of casual sun exposure, and the glow went from bright lime to a dull yellow-green that barely registers past three feet.
Condition matters more here than with regular Funko Pops because any damage to the box dramatically affects resale value. These figures typically ship in standard Funko boxes without additional protective packaging, and the glow-in-the-dark vinyl tends to show scuffs more visibly than matte-finish variants. I once bought a listed-as-mint example that had a small indentation on the upper left shoulder that wasn't visible in any of the seller's photos. The listing claimed "perfect condition" and I only caught it when I opened the box under normal lighting. Had I relied on glow photos, I never would've noticed it. Now I ask for specific close-up shots of the shoulders and head before purchasing anything above $100. Authentication is another practical concern. Funko doesn't publish an official rarity list that clearly separates glow variants from standard releases in a way that's easy to verify. Some sellers on third-party platforms swap out the insert card or replace the figure inside a genuine box with a different variant. I've seen this happen with at least three separate listings in the past year. The most reliable check is comparing the figure's glow under a UV light against reference photos from verified purchases. The photoluminescent material reacts differently under UV than regular vinyl does, and a swapped figure will show a noticeably different fluorescence pattern. It takes about thirty seconds and requires a $15 blacklight from any hardware store. If you're looking to buy, the main problem is that legitimate stock is extremely thin. Most available units are either used, repackaged, or sourced from liquidation lots where the original packaging may have been compromised. I'd recommend prioritizing sealed copies even at a premium over loose figures, because the resale market heavily penalizes unboxed items. A sealed copy in good condition typically holds value better than a loose one regardless of the figure's physical state. The box itself carries about thirty percent of the total market value for this variant.
For those who already own one and want to preserve it, keep it away from heat sources and direct sunlight. Store it in a climate-controlled environment if possible. The glow effect won't improve with age, and improper storage will only accelerate degradation. There's no cleaning method that restores lost luminosity, so prevention is the only real strategy. I keep mine in a display case with UV-filtering acrylic panels, which costs around $40 and has made a measurable difference over fourteen months of ownership. The market outlook is unpredictable. Demand could stabilize or drop if Blue Period content slows down, which historically affects character-based collectible pricing within six to eighteen months. On the other hand, if the franchise gains mainstream traction in North America, scarcity will likely push prices higher. There's no reliable indicator for which direction this moves, which is why I don't treat this as an investment play. It's a niche collectible with a volatile secondary market and limited supply that won't increase. Buy it if you want the figure. Don't buy it expecting to sell it for a profit unless you're comfortable holding it for several years with no guarantee of appreciation.
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