Auxiliary (246) has engaged into a battle with you. the notes describe it and it's past.

Auxiliary's Battle Theme

He has returned for revenge. 247 will stop at nothing to make sure it occurs.

Battle with The Last One ST

Basically sums up all the bots in one song.  wow.

The Robots

A Robot's Revenge

A little present for a friend, known as mei.
I hope you like it, Mei. 

A tune describing the both happiness, and randomness of mei. wholesome. and sometimes a hint of sadness. But it always gets better. :>

Robotic_247