Invisible HelixKeigo HigashinoDetective Galileo, book 11

Characters in Invisible Helix

5 characters, main characters first.

Main characters

Manabu Yukawa
Also in A Midsummer's Equation A Detective Galileo Mystery, Silent Parade A Detective Galileo Novel

Supporting characters

Sonoka Shimauchi
Ryota Uetsuji
Kusanagi
Also in Salvation of a Saint, Silent Parade A Detective Galileo Novel
Utsumi