The Rat

Alexei Koseff is one of the Senate members, the Senator of the Senate, holding governorship to one of the Republic territory. 

Jean is here. 

And members of the Senate are also here. 

Although not all of them are here, some are in the Senate in Moscow, holding the fort, exercising power

And of course, there is also Katarina in this island city. It is no wonder that the people of the Republic is very anxious. 

They are anxious if the Ice Queen returns back to Moscow. 

A civil war between the forces under Jean and under Boris might go to war to settle the score and that is not something any members of the Republic wanted to see,

Peace is hard to obtain, but war is easy to start. 

Thus, it is not weird at all that there are many members of the Republic here compared to the other world powers

Alexei is on the side of Jean faction. It is then not weird seeing him here. He spoke to a few statesman of the world powers.