Gakumas Reroll Guide: Should You, What Spark Is, and What to Aim For

Rerolling is creating and restarting accounts repeatedly to "fish" for a satisfying start from your early free pulls, before you pour time into one account. It costs effort and time, so weigh it: if you'd rather start now and build up gradually, you can skip rerolling. If you want a solid long-term foundation, rerolling for a good starter P-idol is reasonable. There's no one right answer — it depends on how much you want to optimise.

Gakumas gacha yields two main things: P-idols (the units you produce, locked to a plan) and support cards (which bring cards and effects into your produce runs). SSR is the rarest rarity. Because a P-idol decides the plan and playstyle for the whole run, reroll goals usually center on a specific P-idol rather than hoarding many small pulls. The P-idol library lets you see the full roster and who runs which plan before deciding who to aim for.

Spark is a pity system: each pull earns you a little pity, and once it's full you exchange for a limited P-idol you want — meaning no matter how unlucky you are, enough pulls guarantees that unit. The community commonly cites a threshold of around 200 pulls. That 200 figure, the SSR rate and specific jewel costs all need official verification and may differ per banner, so treat 200 as a community estimate, not a settled number. Before each banner, check that banner's actual Spark conditions.

• Aim for a P-idol that fits the style you enjoy — Sense for bursts, Logic for steadiness, Anomaly for the unusual. A P-idol shapes the whole run, so it's the most important choice.
• Check the tier list instead of chasing rumours. Our P-idol tier list has two modes: Signature power (108 SSR P-idols ranked by the total power of their signature set, computed with the contest formula — a number anyone can recheck) and Community rating (59 P-idols scored by Japanese community voting, with the source and date shown). Community ratings shift between versions, and signature power is a static number that does not capture live play perfectly — read both before committing.
• Track your progress toward Spark with the gacha tool so you know how far you are from the threshold.