A machine translation of the artist commentary says that this is their "first Arknights drawing," but I'm not familiar with these characters. Could someone help me with these characters? Thanks in advance!

asdfpersonthing said:

A machine translation of the artist commentary says that this is their "first Arknights drawing," but I'm not familiar with these characters. Could someone help me with these characters? Thanks in advance!

Thank you @Krad_Hunter !