Suma: we are one. Inseparable.

Katsu: nothing can tear us apart. So you may as well give up trying to take us away from each other.

Suma is the blue one and Katsu is the purple one. Remembering that now.

these two have been through thick and thin. However they both have mystical powers no one has yet uncovered. Suma seems to be curvier and bustier than katsu however katsu is the eldest twin and leads her you her sister.