Even uncontrollable ordinary Alpha-level psychics are like this, not to mention the controllable ones.
Gu Jing is a controllable one; strictly speaking, Meifenier doesn't exactly use spiritual energy, but you can consider her as one.
The spiritual energy suppression effect brought by the black stone bracelet on their hands is actually like nothing; they can easily break through it.
Previously, not breaking through was just to give the Infinite Warriors some credit.
In urgent times, use it when needed, like the instance of rescuing Neili.
In reality, Meifenier doesn't necessarily intend to watch Neili die.
After all, it has always been this Battle Group Leader from the Infinite Corps who opposed their rescue of the Son of God. If he dies, won't...?
Definitely not.
It was Gu Jing who wanted her to help.
Neili cannot die.
If he dies, his replacement won't readily agree to let aliens rescue the Father of Genetics.
