Artificial intelligent assistant

characterial

characterial, a. rare.
  (kærəkˈtɪərɪəl)
  [f. as charactered ppl. a. + -ial; after ministerial, etc.]
  Of or belonging to (dramatic) characters.

1881 Halliwell-Phillips Outlines Shaks. (1885) 80 Shakespearian in its characterial fidelity. Ibid. i. (1886) 104 Shakespeare's..unlimited power of characterial invention.

Oxford English Dictionary

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