Не унывай : possible to translate 'Dont be upset'


3) наряд - has more than 1 meaning
another meaning is 'order to conduct/perform works', 'work order' usually in construction or complex technical works where crews are involved
but 'fancy clothes' is the meaning mainly used in neutral contexts

5) хищница
vamp? you can use this equivalent, though sometimes Russian internet media use the calque "вамп"