Particle movement direction and object rotation

I need to get a connection between the rotation value of the scattered object and the direction of the particle movement.
For example, the face of a character faces the direction of particle movement.
I tried to use the utility to get the motion vector. But still failed.Particles from houdini。
Thank you
For example, the face of a character faces the direction of particle movement.
I tried to use the utility to get the motion vector. But still failed.Particles from houdini。
Thank you