The LEGO Friends Summer Heart Box subtheme, introduced in 2019, inlcudes 6 mini-doll figures across 5 sets.
Most valuable Friends Summer Heart Box mini-doll figure
Mia (frnd315) $2.06
Most owned Friends Summer Heart Box mini-doll figure
Stephanie (frnd314)
Set with the most Friends Summer Heart Box mini-doll figures
41387 Olivia's Summer Heart Box 2 mini-doll figures
LEGO Friends Mini-doll figures are a distinct type of figure introduced in 2012 as part of the LEGO Friends theme, designed to appeal primarily to girls. These mini-dolls are more detailed and realistic in proportions compared to traditional LEGO minifigures, featuring movable limbs, interchangeable hairpieces, and a variety of accessories. They are slightly taller and slimmer, with a more lifelike appearance that enhances the play experience by providing a closer representation of human characters.

The LEGO Friends theme centers around the lives and adventures of five main characters—Andrea, Emma, Mia, Olivia, and Stephanie—in the fictional town of Heartlake City. Each character has distinct personalities, interests, and hobbies, reflected in the diverse sets that include houses, shops, vehicles, and various community locations.
6 minifigs
Mini-doll figure number frnd319
Zobo the Robot is a friend wearing a cap
Value $1.01
Mini-doll figure number frnd318
Olivia from Friends theme wearing a dark pink skirt and top
Value $1.91
Growth  +40.4%
Annual growth 6.0%
Mini-doll figure number frnd315
Mia from Friends theme wearing dark purple shorts and a striped top
Value $2.06
Growth  +7.3%
Annual growth 1.2%
Mini-doll figure number frnd314
Stephanie from Friends theme, wearing a medium azure skirt and striped top
Value $1.16
Growth  +1.8%
Annual growth 8.9%
Mini-doll figure number frnd313
Emma from Friends theme, wearing a swimsuit and flippers
Value $2.01
Growth  +3.6%
Annual growth 0.6%
Mini-doll figure number frnd312
Andrea from LEGO Friends wearing a dark turquoise skirt with a dark blue top
Value $1.94
Growth  +54.0%
Annual growth 7.5%