Question

In which tense it is good to write character sketches in English?​

Answer 1

It is better to write character sketches (especially of novels) in past tense as these are character sketch which can be understood only after reading the story.

Answer 2

Writing character sketches depends on the person you are writing about. If the person is still alive, then you can use any tense. But if the person isn't alive anymore then using the past tense would be the best. Mostly past perfect tense is used to write character sketches.