If striker means hitter...
^ the previous answer is incorrect.
There is no "striker" in volleyball. There is though a SPIKER, who can be either a middle or power,
the three positions in volleyball are a setter, middle and power.
Setter being the most important because they get passed the ball to set it up nice and high for either the power or middle to spike or send it over the net.
Yes, the striker is the one that spikes.
He is a striker.
Klose is a striker
He played as a striker.
every single position on a volleyball court serves. there is no specific serving position
support striker (or informally known as shadow striker)