[2] She graduated high school from the University of Southern Philippines Foundation where she played a Middle Hitter.
[7][8] She also played in the 18th Nestea Beach Intercollegiate Beach Volleyball with Kim Fajardo in 2015, replacing Fajardo's previous partner, Ara Galang[9] winning the silver medal after losing 1-2 to the University of Santo Tomas representatives, the Rika Rivera and Cherry Rondina duro.
[10] With Kim Fajardo she won the 2015 UAAP's beach volleyball tournament, the first ever for De La Salle University.
[11] During the 2015 Philippine National Games, she was awarded First Best Outside Hitter and won the gold medal with De La Salle University when they defeated College of St. Benilde Lady Blazers.
[12] Demecillio played with Meralco Power Spikers in the 2015 Philippine Super Liga Grand Prix Conference[13] and with F2 Logistics Cargo Movers for the 2016 Philippine Super Liga All-Filipino Conference[14] helping that club to win their first Superliga championship.