TSUKI is the moon. This kanji gives calm and mysterious impressions and I think it matches Tsukishima’s character 🌛
It reads SHIMA or JIMA and means an island. This is one of the most common kanji letter used for Japanese family name.
Ushijima Wakatoshi at Shiratorizawa high school, Nakashima Takeru and Matsushima Tsuyoshi at Wakutani Minami high school also have this kanji for their family names.
This character stands for a firefly. I’m not sure if there’re fireflies outside Japan, but firefly flashing in summer night is beautiful and I really love it 😊
So Tsukishima Kei’s name pictures the moonlit night with dancing faint light of fireflies. I think it’s a fantastic and somehow mysterious name.