Question: An inner satellite of which planet is named for a Shakespearean character notable for "the quality of mercy" speech?

Context paragraphs:
The quality of mercy (Shakespeare quote): "The quality of mercy" refers to a quote by Portia in William Shakespeare's "The Merchant of Venice"; it occurs during Act IV, Scene 1, set in a Venetian Court of Justice.  It is the speech in which Portia begs Shylock for mercy.  Some sources set apart the first four lines of the speech or refer only to the first four lines as the subject of "The quality of mercy".  Other sources refer to a longer portion of the speech but not the full 22 lines.

The Merchant of Venice: The Merchant of Venice is a 16th-century play by William Shakespeare in which a merchant in Venice must default on a large loan provided by an abused Jewish moneylender.  It is believed to have been written between 1596 and 1599.  Though classified as a comedy in the First Folio and sharing certain aspects with Shakespeare's other romantic comedies, the play is perhaps most remembered for its dramatic scenes, and it is best known for Shylock and the famous "Hath not a Jew eyes?"  speech.  Also notable is Portia's speech about "the quality of mercy".  Critic Harold Bloom listed it among Shakespeare's great comedies.

Portia (moon): Portia ( ) is an inner satellite of Uranus.  It was discovered from the images taken by "Voyager 2" on 3 January 1986, and was given the temporary designation S/1986 U 1.  The moon is named after Portia, the heroine of William Shakespeare's play "The Merchant of Venice".  It is also designated Uranus XII.

Onufry Zagłoba: Jan Onufry Zagłoba is a fictional character in the "Trilogy" by Henryk Sienkiewicz.  Together with other characters of "The Trilogy", Zagłoba engages in various adventures, fighting for the Polish-Lithuanian Commonwealth, and seeking adventures and glory.  Zagłoba is seen as one of Sienkiewicz most popular and significant characters.  While he has often been compared to Shakespearean character of Falstaff, he also goes through extensive character development, becoming a jovial and cunning hero.

Daphnis (moon): Daphnis ( ; Greek: Δάφνις ) is an inner satellite of Saturn.  It is also known as Saturn XXXV ; its provisional designation was S/2005 S 1 .  Daphnis is about 8 kilometres in diameter, and orbits the planet in the Keeler Gap within the A ring.

HMS Prospero: Three ships of the British Royal Navy have been named Prospero for the Shakespearean character Prospero:

Proteus (moon): Proteus ( ; Greek: "Πρωτεύς"), also known as Neptune VIII, is the second largest Neptunian moon, and Neptune's largest inner satellite.  Discovered by "Voyager 2" spacecraft in 1989, it is named after Proteus, the shape-changing sea god of Greek mythology.  Proteus orbits Neptune in a nearly equatorial orbit at the distance of about 4.75 equatorial radii of the planet.

Inner moon: In astronomy, an inner moon or inner natural satellite is a natural satellite following a prograde, low-inclination orbit inwards of the large satellites of the parent planet.  They are generally thought to have been formed "in situ" at the same time as the coalescence of the original planet.  Neptune's moons are an exception, as they are likely reaggregates of the pieces of the original bodies, which were disrupted after the capture of the large moon Triton.  Inner satellites are distinguished from other regular satellites by their proximity to the parent planet, their short orbital periods (usually under a day), their low mass, small size, and irregular shapes.

Belinda (moon): Belinda ( ) is an inner satellite of the planet Uranus.  Belinda was discovered from the images taken by "Voyager 2" on 13 January 1986 and was given the temporary designation S/1986 U 5.  It is named after the heroine of Alexander Pope's "The Rape of the Lock".  It is also designated Uranus XIV.

Cupid (moon): Cupid ( ) is an inner satellite of Uranus.  It was discovered by Mark R. Showalter and Jack J. Lissauer in 2003 using the Hubble Space Telescope.  It was named after a character in William Shakespeare's play "Timon of Athens".

Supporting paragraphs: Portia (moon) The Merchant of Venice
Answer: Uranus