Use the last letter

[TheRiddler]

Melbourne.

 

[Rabbitboy]

East.

 

[Barbas]

Teal.

 

[Clearwaters]

Lime

 

[Barbas]

Engine.

 

[TheRiddler]

Enigma.

 

[Barbas]

Arbalest.

 

[Drake the Dragonheart]

Tornado

 

[TheRiddler]

Odalisque.

 

[Johnny Novgorod]

Enmity

 

[Barbas]

Yellow.

 

[RedDeadFred]

Walrus.

 

[Barbas]

Scarcity.

 

[TheRiddler]

Yttrium.

 

[Barbas]

Malevolence.

 

[Fijiman]

euphonium

 

[TheRiddler]

Mulch.

 

[Barbas]

Hamish.

 

[The Squid King]

Hannah

 

[Barbas]

Hoplite.