How do the following stage directions affect the audience's understanding of Otto's character?

Otto looks around to see the stage is empty. He wears a stern expression, pacing back and forth. From time to time, he looks at the clock on the wall as the minutes tick away.

The stage directions indicate which props Otto will be using.
The stage directions indicate which props Otto will be using.

The stage directions contain dialogue between Otto and others.
The stage directions contain dialogue between Otto and others.

The stage directions reveal that Otto is impatient and frustrated.
The stage directions reveal that Otto is impatient and frustrated.

The stage directions show a monologue to express Otto's feelings.

The stage directions show a monologue to express Otto's feelings.

Overall, these stage directions depict Otto as a character who is stern, impatient, frustrated, and possibly anxious about the passage of time. His pacing and frequent glances at the clock suggest a sense of urgency or restlessness. This helps the audience understand Otto as someone who is intense and driven, possibly struggling with inner turmoil or external pressures.