Tom:
The sharpest lives (The black Parade 2006)
or
I don't love you (The black parade 2006) - idk i think he would sing this when he's drunk. idk *wheeze*
Regulus:
Dead! (The black Parade 2006)
or
I'm not okay (may death never stop you 2014)
Narcissa:
Disenchanted (The black parade 2006)
or
interlude (three cheers for sweet revenge 2004)
Sirius:
Mama (The black parade 2006)
or
Hang 'em high (three cheers for sweet revenge 2004)