I couldn’t verify a current in-game method for Dragon Soul specifically, but the most likely answer is that Aizen hair is obtained through the game’s hair customization or a limited reward/drop tied to an event or shop rotation. If you mean a Roblox-style anime game, Aizen hair is usually a cosmetic item you equip from the avatar/customization menu after unlocking or buying it.

What to try

  • Check the hair or cosmetics shop in-game first. Some Aizen-style hair items are sold directly as catalog cosmetics or limited event rewards.
  • Look for event rewards, battle pass tiers, or milestone unlocks. Community posts about similar games show hairstyle rewards being tied to point thresholds or limited-time modes.
  • Search the game’s official Discord or update notes for “Aizen,” “hair,” or “cosmetic.” Fan videos and showcases often point to new update-added unlocks rather than a permanent quest.

Likely confusion

  • If you meant Dragon Soul and not a different Bleach game, the name of the cosmetic may not literally be “Aizen Hair”; it could be a slick-back or long hair variant inspired by Aizen.
  • If you meant a broader Roblox anime game, the item may be in a catalog-like avatar section rather than earned through combat.

Practical steps

  1. Open the game’s shop or avatar/customization menu.
  2. Search for “Aizen,” “slick back,” or “Bleach hair.”
  3. Check event tabs, codes, and limited cosmetics.
  4. If unavailable, it may be a retired or seasonal item.

TL;DR: In most cases, you get Aizen hair by buying, unlocking, or claiming it as a cosmetic reward in the game’s customization or event system, not from a story quest.