Starting weapon grows stronger when levelling up. Revivals also affect Amount. Receives a follower after reviving.

Bats is a conditionally viable character. More effective in goal-focused runs or special stages than general builds. Key is leveraging the starter weapon (マッゾ・ファミリア) characteristics.

Intentionally build around the starter (マッゾ・ファミリア). Generic passives alone underperform — pick to match the character's identity.