Riddle me this;

Who leads, but sits not on a throne?
Who party's and thus does not lead?

Original by me:

I am cast to protect,
I can be thrown as disrespect .
Add me to an image as an effect,
Lower me in a window when you want to disconnect.

What am I?

I am the beginning of sorrow and the end of sickness. There's no happiness without me, nor is there sadness. I am always in risk, yet never in danger. You will find me in the sun, but I am never out of darkness.

(The letter S.)

I can cut like a knife or soothe the soul. I can bring peace or start wars. I can build-up or tear down. What am I?

My teeth can bite to the bone
but do not make you bleed.
I can extend life
as readily as take it.
But when I come
everything slows to a stop.

What am I?

What can be seen but not touched?

Voiceless it cries, wingless flutters, toothless bites, mouthless mutters. What am I?

I am a five-letter word. I sounds the same when you remove my first letter. I sound the same when you remove my 3rd letter. I sound the same when you remove my last letter, and I sound the same when you remove all three. Which word am I?

Answer: Empty, mpty, emty, emp-t, m t.

I can intimidate you with my presence, but bump my head into things. I'm quick to fire but easily distracted. What am I?

What is seen in the middle of March and April that can’t be seen at the beginning or end of either month?

It never comes back, although it never went away. What is it?

Two men are in the desert. Both have backpacks on. One is dead, the other alive. The dead man's pack is closed, while the living man's is open. What was in the backpack?

Answer below:

A parachute

I can start a war or end one for simply malice or fun.
I can grant you the strength of gods, or leave you powerless, bestow greatness or blanket you with cowardice.
I can sometimes be snared by a glance if one should take the chance.
No force can compel me to stay, regardless of what you say.

Answer: True Love

*Disclaimer*
This is riddle I believe was used in the TV series Gotham.