There is no narrator per se. Each voice performs its own contribution to the novel. In the dialogic or polyphonic novel, everything is understood as part of the whole. Nothing exists in isolation. The distinction between a sentence and a Bakhtinian utterance is important in The Waves .
Sentences are repeatable, but each utterance is unique.
The context surrounding a particular sentence is never exactly the same, and the meaning is unique to that occurrence, although the repetition of the sentence may appear to suggest a pattern. It stamps, and stamps, and stamps. Louis will repeat this sentence, or similar ones, on p. 58 and again on p. 67. Thus we have a recurring image that may tell us something about Louis, but we must also recognize each utterance of this statement as it appears in very different contexts. However, the contexts in which this statement appears are always in Louis's voice.