Hi and many thanks for your greetings!
The most common equivalent of these words are the following:
cute: χαριτωμένος, γλυκός, γλυκούλης
kind: καλός, ευγενικός, καλοσυνάτος
nice: ωραίος, καλός, ευγενικός, όμορφος
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Vasiliki Baskou, Instructor/Director, https://learn-greek-online.com.