Bring your friend to a Buddhist temple, Thai, Chinese or
Tibetan,it does'nt matter!
All temples are protected by the Dharma Protectors, eg. Four
Heavenly Kings. The entity should'nt follow her into the
temple!
You can get you friend to chant Atanatiya Sutra to get
protection of the Four Heavenly Kings and their retinue. Or the
Great Compassion Mantra"Ta Bei Zhoe", "Gate, Gate, Paragate ,Mantra
of Heart Sutra" Parasamgate Bodhi Svaha "
She chanted and the spirit became aggressive and
attacked.
The ju shi ling - Singapore Buddhist Lodge at Kim Yam Road, off
River Valley, will they help in such case?