Two-character transliteration:
凯 (kǎi, "K-") +
丝 (sī, "-ss/-th").
丝 (silk) is a stock feminine character in name transliterations because of its soft sound and "silken" connotation — see also
爱丽丝 (Alice),
露丝 (Ruth).
凯丝 typically renders Cass, Cath, or Kath in dubbed media.
