Tsukasa is a second year student at Kamiyama High School. He's part of the musical show unit Wonderlands x Showtime. Ever since Tsukasa watched a show performed by his favorite theater troupe, he has dreamed of becoming the star of a world-class show. At some point, he was hired to work part-time at a theme park, but the Phoenix Wonderland Stage he got assigned to draws no customers. One day he met Ootori Emu who wants to revive the stage to its former glory. He also takes care of his younger sister, Tenma Saki, who was born with a weak body.

Tsukasa is a very confident and charismatic person, referring to himself as a present and upcoming 'star'. He has a notable habit of showing off, alongside a tendency to get caught up in the moment. He's also shown to be a caring and reliable older brother towards Saki, often taking care of her.

As a young child, Tsukasa was less self-assured and more uncertain, frequently worrying about Saki and her sickly condition. He expressed a wish to see her and his parents smile and laugh again, but for a long time was unsure how to achieve this wish. However, that changed when his parents decided to take him and his sister to watch a show. It's during this show that Saki points out the performers with glee and Tsukasa shares in her excitement, seeing that she's smiling again for the first time in a long while. 

Unfortunately, as he grows up he forgets his original motivation for becoming a 'star', instead becoming fuelled by the idea of people paying attention to him and being impressed by him.

Tsukasa has a mid to mid-highish range voice and is very energetic.