What is the rhetorical device that lotus leaves emerge from the water against the blue sky?

Personalization of rhetoric.

Personification rhetoric is to personify things, and to turn things without human actions and feelings into things with human actions and feelings.

Rhetoric is a collection of expression methods used in various articles or applications to improve the expression effect. There are 63 categories and 79 subcategories of figures of speech. By modifying and adjusting sentences and using specific expressions, the way of language expression can be improved.