The Janus Pack

Donghyun

• alpha
• best control of the pack
• don't get him angry
• original member
• turned and taught by a rogue lycan
Disguise: restaurant pianist
Job - Alpha
Status: dangerous
Size: large
Colouring: white wolf

Hyunseong

• shy
• books over socializing
• kindest
• found by Donghyun (2nd member)
• discovered Donghyun's secret and convinced Donghyun to turn him
Disguise: street drummer
Job - keeping the pack in line (beta)
Status: dangerous
Size: large
Colouring: ochre wolf

Youngmin

• prideful
• sensitive
• charismatic
• discovered by the pack after getting into a fight when he was caught trying to steal (4th member)
• turned when his attacker ran away before finishing him off
Disguise: temporary bartender
Job - hunter, communications with other packs
Status: moderately dangerous
Size: medium
Colouring: red wolf - identical to Kwangmim except for the brown eyes

Kwangmin

• unpredictable
• lost his innocence and changed
• dark
• discovered by the pack after attacking when Youngmin was taken down (5th member)
• turned after fighting his brother's attacker and getting bit in the process
Disguise: Unable to have a disguise, due to his uncontrollable nature
Job - getting information through force, hunter
Status: severely dangerous
Size: medium
Colouring: red wolf - identical to Youngmin except for the blue eyes

Jeongmin

• mysterious
• optimistic
• joker
• discovered when sneaking around the packs hunting ground (3rd member)
• turned by another pack that has been otherwise eradicated
Disguise: magician
Job - perimeter duty
Status: benign
Size: small
Colouring: brown wolf

Jinwoo

• temperamental
• newest lycan
• turned by Hyunseong after a fatal fight and has followed him ever since  (6th member)
• likes Hyunseong
Disguise: hapkido instructor
Job - perimeter duty
Status: very dangerous
Size: small
Colouring: black wolf

~ Statuses and groupings may change during the story.

Obviously they're all Lycans so they're pretty similar in danger levels (depending on sizes of their wolf form and their health/training), but their status isn't just about their abilities, it's about how willing they are to use them to harm other creatures

Sizes: large = think the Twilight movies wolf size 
Medium: much larger than a normal wolf, but a few inches smaller than 'large'
Small: size of a healthy, strong adult male lion

So in the right circumstances, assuming the wolf is healthy and more cunning, a medium lycan could take down a large one without too severe of wounds. However, in order for a small lycan to defeat a large one, the large lycan would have to be severely handicapped in some way 

Yes yes discourse about wolf packs having alpha beta set ranks yadayada, but it makes it easier in this case soooo oop~

benign < slightly dangerous
< moderately dangerous
< dangerous
< very dangerous
< severely dangerous