Manga names don't have to be Japanese. They can be in any language or a combination of languages that make sense for the story and characters. It all depends on the author's vision and creativity.
Well, a lot of Japanese names have meanings related to nature. For example, 'Sakura' which means cherry blossom. In Japanese culture, cherry blossoms are symbols of beauty and transience. They are highly cherished, and many girls are named Sakura to embody that beauty. Another example is 'Haru' which means spring. Spring is a season of new beginnings in Japan, so the name Haru can represent freshness and hope.
Well, 'Mika' could be an elf name in Japanese novels. Japanese novels sometimes combine local naming styles with fantasy elements. 'Mika' is a simple and sweet - sounding name that can be used for an elf character to show its more approachable side.
One way is to consider the meaning of the names. For example, if your story has a theme of nature, you can choose names like Mori (forest) or Kawa (river).
Masculine novels often feature male protagonists in roles that require physical strength or courage. For example, in adventure novels like 'Treasure Island', Jim Hawkins shows his courage in the face of pirates. Another characteristic is the exploration of male - specific emotions like pride and honor. In 'Ivanhoe' by Walter Scott, the characters' sense of honor is a central theme.