Most Expensive Oshi no Ko Weiss Schwarz Cards
The top 10 most valuable cards from the Oshi no Ko Weiss Schwarz set (WS-OSK), ranked by current market price. SSP signed parallels dominate — six of the top ten are SSPs. Prices in USD from TCGcsv market data.
What drives value in this set
The Oshi no Ko WS set (WS-OSK) has 11 SSPs — and they account for the entire top 6 by a wide margin. Kana Arima appears three times in the top 10 (two SSPs and one SP), reflecting her position as the most beloved character in the fandom. Ai Hoshino's SSP sits at #2 despite her limited screen time in the manga's later arcs. The first non-signed card to make the list is the An Ordinary Happiness RRR+ at #8 ($150), showing the gap between signed and unsigned chase cards.
Top 10 Most Valuable Oshi no Ko WS Cards
Prices reflect TCGcsv.com market data as of September 2026. All cards are from the English WS-OSK set.
1
"B-KOMACHI" Kana Arima — SSP
Oshi no Ko · WS-OSK · E004SSP · Super Signed Parallel
SSP Signed
The most valuable card in the Oshi no Ko WS set. Kana Arima's B-KOMACHI idol variant SSP commands a premium over even the standard Kana Arima SSP (#3 on this list), because the B-KOMACHI art captures the moment that resonates most with the fanbase — Kana finding her stage persona. All SSPs feature a gold-stamped voice actor signature; Kana's seiyuu Megumi Han's autograph drives collector demand across both versions. The B-KOMACHI variant consistently outsells every other card in the set on the secondary market.
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$520
2
Ai — SSP
Oshi no Ko · WS-OSK · E027SSP · Super Signed Parallel
SSP Signed
Ai Hoshino is the emotional core of Oshi no Ko — the superstar idol whose death sets the entire story in motion. Despite dying in the very first chapter, she remains the most iconic character in the franchise, and her SSP is one of the most sought-after in the set. Her VA, Rie Takahashi, is a major name in anime voice acting, which adds to the signed card's appeal. Any Ai-signed card carries cross-market desirability beyond typical WS collectors.
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$500
3
Kana Arima — SSP
Oshi no Ko · WS-OSK · E028SSP · Super Signed Parallel
SSP Signed
The second Kana Arima SSP in the set, featuring her in a different art style and moment from the story. Kana's trajectory — from child prodigy actress to struggling performer to B-KOMACHI idol — gives the character emotional depth that translates into strong collector demand across multiple cards. The $467 market price for this SSP is nearly identical to #4 Akane Kurokawa, showing how tight competition is among the top-tier SSPs in this set.
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$467
4
Akane Kurokawa — SSP
Oshi no Ko · WS-OSK · E066SSP · Super Signed Parallel
SSP Signed
Akane Kurokawa — the method actress who perfectly imitated Ai to the point of emotional crisis — is one of the most complex and compelling characters in the series. Her SSP is the first card from the second half of the set's box count (E060s), indicating she appears in a later chapter's booster. Her $420 market value places her firmly in the top tier, just behind the iconic trio of Ai and Kana. Akane's relationship with Aqua and her transformation arc make her a fan favorite.
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$420
5
Aqua — SSP
Oshi no Ko · WS-OSK · E065SSP · Super Signed Parallel
SSP Signed
Aqua Hoshino is the male protagonist of the series — the doctor Gorou reincarnated as Ai's son, driven by revenge for his mother's murder. His SSP market value at $225 drops sharply from the top 4, which reflects a pattern common in WS sets: male character SSPs typically trade at 40–60% of equivalent female character SSPs even when the character is the main protagonist. His VA is Takeo Ootsuka. Aqua's card is still a strong pull — it just doesn't match the collector frenzy for the idol-adjacent characters.
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$225
6
Ruby — SSP
Oshi no Ko · WS-OSK · E029SSP · Super Signed Parallel
SSP Signed
Ruby Hoshino — Aqua's twin sister, the girl who pursues their late mother's dream of becoming an idol — has one of the most emotionally resonant arcs in the series. Her SSP lands at $200, placing her just below her brother's card despite being a female character. Ruby's VA is Rie Takahashi — the same voice actor as Ai Hoshino — which creates an unusual dynamic where the same VA signs both the #2 and #6 card on this list. A Ruby SSP is effectively also an Ai VA-signed card.
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$200
7
Ruby — SP
Oshi no Ko · WS-OSK · E003SP · Signed Parallel
SP Signed
The first non-SSP card on this list. SP (Signed Parallel) is a step below SSP in rarity — still featuring a stamped VA signature, but with a slightly higher pull rate and without the "super" parallel art treatment. Ruby's SP at $175 trades close to SSP territory, driven by the same Rie Takahashi autograph factor. SPs in the OSK set appear as trial deck exclusives, making them separately-distributed chases that don't compete directly with booster-pulled SSPs for box-break attention.
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$175
8
An Ordinary Happiness — RRR+
Oshi no Ko · WS-OSK · E063EX · Triple Rare Plus
RRR+
The highest-valued unsigned card in the set. RRR+ (Triple Rare Plus) is the holographic foil parallel of the RRR rarity — typically one of the most visually striking non-signed cards in any WS set. "An Ordinary Happiness" at $150 shows that a well-executed foil parallel with strong art can approach SP-level pricing. It's the best option for collectors who want a high-end OSK card without chasing the signed variants. There are 5 RRR+ cards in the OSK set.
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$150
9
Kana Arima — SP
Oshi no Ko · WS-OSK · E002SP · Signed Parallel
SP Signed
Kana Arima's SP variant rounds out this list's signed cards — with two SSPs and one SP on the same top-10, Kana is the most represented character in the set's valuable tier. The $147 market price for her SP is competitive with the "B-KOMACHI" MEMcho SSP (#10), which shows that character popularity can override the typical SSP/SP rarity premium. Megumi Han-signed Kana cards of any rarity carry extra demand from voice acting enthusiasts outside the usual WS collector base.
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$147
10
"B-KOMACHI" MEMcho — SSP
Oshi no Ko · WS-OSK · E003SSP · Super Signed Parallel
SSP Signed
MEMcho rounds out the top 10 in her B-KOMACHI idol variant. The social media influencer-turned-idol is a fan-favorite supporting character whose quirky personality and unlikely pivot to idol life make her arc memorable. Her $139 SSP market price is the entry point to the signed tier of this set — the remaining SSPs and all OFR and RRR cards trade below this level. MEMcho's inclusion means five of the ten most valuable OSK cards feature the B-KOMACHI idol group in some form.
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$139
Understanding OSK WS Card Rarities
Chase card breakdown — WS-OSK set
- SSP (Super Signed Parallel) — 11 cards. The top-tier chase. Stamped gold VA signature, special parallel art. Average pull rate: ~1 per 2–3 boxes.
- SP (Signed Parallel) — Trial deck exclusive signed cards. Distributed separately from boosters; not in booster box pulls.
- OFR (OverFrameRare) — 15 cards. Holographic foil with artwork extending beyond the card frame. Non-signed, but visually striking. ~1–2 per box.
- RRR+ (Triple Rare Plus) — 5 cards. Foil parallel of RRR rarity. The best non-signed pull from a booster box.
- SecretRarePlus — 2 cards. Extremely scarce; rarer than SSPs in pull rate.
- SerialRare — 1 card. Serialized unique number, the rarest card in the set by print run.
The Kana Arima effect
Kana Arima appears in three of the top 10 most valuable OSK WS cards — more than any other character. In Oshi no Ko's Western fandom, Kana has consistently polled higher than even Ai, with her tsundere personality and slow-burn relationship with Aqua resonating strongly with the WS-playing demographic. This level of market dominance (two SSPs + one SP all in the top 10) is unusual even for lead characters in a WS set.
Frequently Asked Questions
What is the most expensive Oshi no Ko Weiss Schwarz card?
The most valuable Oshi no Ko WS card by market price is the "B-KOMACHI" Kana Arima SSP (E004SSP), worth approximately $520. It is followed by the Ai SSP at $500 and Kana Arima SSP (E028SSP) at $467. All three are SSP signed parallels with gold-stamped VA autographs.
How many SSP cards are in the Oshi no Ko WS set?
The WS-OSK set contains 11 SSP cards in total, featuring characters including Kana Arima (×2, including B-KOMACHI variant), Ai, Ruby, Aqua, Akane Kurokawa, MEMcho (B-KOMACHI variant), and others. The set also has 15 OFR foil cards, 2 SecretRarePlus, and 1 serialized SerialRare.
Is the Oshi no Ko WS set worth buying sealed?
Sealed box pulls for SSPs run roughly 1 per 2–3 boxes. At current box prices (~$80–100 USD for English), you're paying $160–300 per SSP on average — significantly more than buying any SSP except the top three directly on the secondary market. Sealed is best for the opening experience; singles are more efficient if you're targeting specific cards.
What are OFR cards in Oshi no Ko Weiss Schwarz?
OFR (OverFrameRare) cards feature full-art holographic treatment with the artwork extending beyond the standard card border. The OSK set has 15 OFRs. Popular OFR cards like "Fake Wings" (E032OFR) and "Beyond That Gaze" (E030OFR) trade between $35–45, making them the best accessible chase cards for collectors who don't need signed parallels.
Should I buy Oshi no Ko WS cards raw or graded?
For most SSPs priced under $300, grading costs (PSA/BGS submission + turnaround time) often don't justify the investment unless the card is in pristine condition with no handling wear on the signature. For the top 3 SSPs ($420+), a PSA 9 or 10 grade can meaningfully increase resale value and provides authentication. Only submit if the stamp looks clean and edges/corners are sharp.
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- Complete Weiss Schwarz Guide for Beginners — rules, sets, where to buy
- Most Expensive WS Cards Sold on eBay in 2026 — $22K+ BGS 10 Black Labels
- Weiss Schwarz Signed Cards Guide — SP, SSP, AGR explained
- Best Storage for Weiss Schwarz Cards — protecting high-value cards