Final answer:
Without additional context, it is challenging to determine the girl's emotional state as being happy or sad from the line 'Rejoice, go, and remember me' in Poem 94. The themes in poetry can reflect mixed emotions, where happiness can coexist with sadness.
Step-by-step explanation:
The sentiment expressed in the line 'Rejoice, go, and remember me' from Poem 94 could be interpreted in various ways depending on the context it is set in. However, based on the given passages, as well as the general themes represented in the quoted lines of poetry, it seems that the reference to rejoicing juxtaposed with memory suggests a complex interplay of emotions. For instance, in the passage 'But a comrade stood beside him...', the tone is one of solace in the face of sadness. Hence, without additional context, it is challenging to determine whether the girl is happy or sad. Poetry often conveys mixed emotions, and the happiness of being remembered can coexist with the sadness of departure or loss.