Do multiple instances of advantage and disadvantage cancel each other?

A PC selfdesguised into an existing NPC uses Friends cantrip

If you paralyze someone can you tie them up?

Can the Monk Shadow Step be used in addition to the normal movement?

If I cast Heroism on a character frightened, does it break the effect?

Why are conjured animals and familiars fey spirits instead of just animals?

Can a Bladesong bypass the shield restriction by taking the War Caster feat?