I have found out something about her in Complete Psionic:
Empower weapon - Psionic power, I think page 85
For example, the 14th-level psychic
warrior Ragnara knows both empower
weapon and oak body. She manifests
empower weapon and chooses to store
oak body augmented with 1 power
point (the maximum allowed at her
manifester level minus 4). At the time
she manifests empower weapon and
stores oak body, she spends 19 power
points (9 for empower weapon and 10
for the augmented oak body). Several
days later, when she manifests the
stored power, she does so without any
power point expenditure.
