Cassiopeia is a piece characterized by brightness and dynamism within a brisk tempo. The arpeggiated chords in the left hand alternate between ascending and descending patterns, reminiscent of the constellation Cassiopeia, progressing fluidly. By playing these smoothly with legato, a sense of unity can be imparted to the melody. The tempo is set at quarter note = 120, and it is advisable to maintain a sense of lightness.

From measure 33, the tempo increases to quarter note = 138, marked piu mosso. The left hand plays staccato eighth notes in an accompanying pattern, while the right hand moves lightly and aggressively above it. Here, maintain a stable rhythm in the accompaniment while playing with a rich, full sound to ensure the right-hand phrases resonate vividly. From measure 53, the piece returns to Tempo I, reinstating the opening atmosphere. The entire piece is structured in a three-part A-B-A form, with an impressive contrast between the flowing, cheerful A section and the rhythmic, aggressive B section. By clearly defining the character of each section while perceiving the whole as a single continuous flow, a more captivating performance can be achieved.