Final answer:
There are no characters assassinated by Macbeth's killers in Act 5 of the play Macbeth. In Act 5, it's actually Macbeth who is killed.
Step-by-step explanation:
In Act 5 of Macbeth, there seems to have been a misunderstanding in the question. Macbeth's killers do not assassinate characters in this Act. Macbeth himself, which the play is named after, is the one who is killed in Act 5. He is defeated and killed by Macduff. The other Assassinations, such as that of Duncan and those ordered by Macbeth (like Banquo's), occur earlier in the play. So, no character is tragically assassinated by Macbeth's killers in Act 5.
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