As you can clearly see Garp and Sengoku beat shiki so bad he turnt into a vice admiral, Shiki is said to be a rival of Rodger , he's also has 2 swords which is foreshadowing of him soling 2 yonkous in the future.
Shiki>Yonkous nuff said the navy is on top and guess whos becoming a vice admiral
Koby 
