Letter 25

Letter 25
In the Aryabhata numeration
Sanskrit 1 = Ka
Sanskrit 25 = Ma
The 25 letters potentially form a square grid of 5 x 5 squares (cf. the number of Heaven). If we draw a diagonal, join Ka and Ma = Kama, which is Desire, personified as the God of Love in the sense of Lust (cf. Kama Sutra).  This Kama is "killed" on the feast of Holi (as in Holidays).