Ancient Myths continued

Today, we’ll have a few more questions about ancient Greek and Roman myth, with each answer featuring an ancient mythical figure.

One

What former Royal Air Force aircraft is pictured?

Two

Can you name a powerful, trident-wielding merman from SpongeBob SquarePants?

Three

Stately, plump Buck Mulligan came from the stairhead, bearing a bowl of lather on which a mirror and a razor lay crossed. A yellow dressinggown, ungirdled, was sustained gently behind him on the mild morning air. He held the bowl aloft and intoned:
—Introibo ad altare Dei.

The opening words of a novel are quoted above. What is this work that chronicles the events of a single day, June 16th, 1904?

Four

Quicksilver is connected to this United States human spaceflight programme (1958–1963): Project…

Five

PRONE SHEEP

…can be rearranged to give the name of a daughter of Zeus and Demeter. She was abducted by Hades and became the queen of the underworld. Who is she?

Good luck! I will post the answers later today.