[x]Mashu
Sitting beside Lockhart will attract attention of majority of people since they will be making deals or offering support for the Albion government. Lockhart will be talking with others so Shinji will be left on his own or representatives might start a conversation with him to see what he thinks of Albion government. Touko might get into argument with sister so don't want to be in that mess. Shinji can talk with Mashu during the dinner and if anything happens she can intervene.