Looking for some great tips and tricks to beat Sister Splinter in Hollow Knight: Silksong? Well, this guide will tell you precisely where to find her in Shellwood, the best Bench to use, and the quickest runback route to her! Know all about dodging her heavy slams, dealing with thorny vines, and disposing of her summoned allies to make everything easier and enable you to unlock new areas in Shellwood.
Where to Find Sister Splinter

Sister Splinter can be found deep in Shellwood to the left of Bellhart. Move through the lower layers until you reach a shaft on the far left. Climb up and take the top-right exit into a room with a Weaver statue. Exit right, unlock the elevator shortcut above the central Bench, then take the elevator up, go right, jump and slash flowers to the top-left of the next room, and continue left to reach her.
The central Shellwood Bench is the closest save point. Unlock the elevator nearby for an easier path. From the Bench, take the elevator up, move through the top-right room, then cross two white flowers to the top-left exit and continue left to reach Sister Splinter.
Sister Splinter Moves & How to Counter Them

Triple Pound: She raises an arm and slams diagonally three times. Dodge opposite the active arm and break vines with Needle or Silkspear if needed.
Wall of Thorns: Several vines appear across the arena. Move between beams and break multiple vines with Silkspear.
Call for Help: She roars and spawns flying allies. Attack her during the roar, then deal with the adds quickly using Tools or Silkspear.
Vine Strike: Thorny vines shoot from the ceiling. Break a few with Needle, or use Silkspear if there are multiple.
Rewards
Defeating Sister Splinter unlocks more of Shellwood. The exit to the left of her arena leads to a Weaver statue. Binding here grants Cling Grip, letting Hornet grab vertical surfaces and wall jump. This ability helps continue toward the Widow fight and explore previously inaccessible areas.