The
ending of Star Odyssey (Blue Almanac) credits him as Masaru Suzuki, so maybe that's right after all! The Blue Almanac album lists him with the given name of 勝, which is absolutely readable as Masaru but not really as Ken (the one we're going with for this entry, 賢, is readable as both). There's an additional sighting of 勝 on MYSTERY CASE in HI! SCHOOL!.