John 117 1x1x7=7 
343 guilty spark- 343 is 7x7 
7 halo rings 
John 117 = 4 letters, 3 numbers 
Cortana- 7 letters 
doctor halsey cloned herself 7 times to create cortana 
at the silent cartographer you storm the beach with 7 marines 
7 covenant races are seen in halo 2 
Jorge 052- 5+2=7 
Emile A-239 = 2+3+9= 14 14/2= 7 
7 armor abilities in halo reach 
That's all I can name because I'm busy