What does michaela mean in Japanese?

There isn't a direct translation of the name Michaela into Japanese. Japanese names typically have a meaning and sound associated with them, rather than being direct translations of other languages' names.

If you wanted a Japanese name with a similar *feeling* to Michaela (which often evokes strength, grace, and possibly a connection to God depending on the interpretation of the name's origins), you would need to choose a name based on its meaning in Japanese. There's no single "perfect" equivalent. You'd need to consider what aspects of Michaela you want to capture.