Group Study is a capstone action skill override skill on branch 3 of Harlowe's Cosmic Brilliance skill tree in Borderlands 4.

Effects

Harlowe spawns a HALO Sidekick for each ally instead of her Flux Generator. HALO Sidekicks automatically fly to each ally and hover near them, granting increased Gun Damage, Fire Rate, and Reload Speed. Action Skill Retrigger: Overload Harlowe's HALO Sidekicks to increase their effects. This effect stacks. While Overloaded, Harlowe's Action Skill Duration drains faster.

• Per activation:
  • Gun Damage: +25%
  • Fire Rate: +10%
  • Reload Speed: +10%
• Duration Rate: +25%

Change History

• The May 28, 2026 patch updated Group Study so that HALO Sidekicks attempt to keep out of the player's line of sight.