some background:

(for those not following the braywashed saga) the two guys in the middle are (real, entirely human) wrestlers Elton Prince & Kit Wilson of Pretty Deadly, introduced to the silm fandom by @kitwilsonsass, and known for their uncanny resemblance to C&C in both appearance and demeanor.

As Arda is Earth, the Dagorath has not yet happened, and PD are human people who exist, it is entirely canon compliant for them to join C&C in the dagorath. Hence, CCPD alliance.

design notes:

CC

Celegorm's tattoos represent a symbol of devotion to Orome/the Hunt by imitating Orome's vala markings. Given that bows aren't the best weapon for melee fights, his primary weapon here is based on a boar spear, because I imagine similar tactics would be helpful against some of Morgoth's larger creatures. He wears the Feanorian star once on his armband and once painted on his shield (not shown).

Curufin's helm is based off the Silm description of the red-plumed helms of the Host of Feanor. His armor features one Feanorian star and the Trees (telperion not shown), and his shield bears one other star. He wears a dwarven knife (not Angrist since beren broke it) on his belt.

PD

Based on braywashed's assortment of PD outfit posts, they seem to have a light/dark color scheme, reflected here in their armor colors. Their hairstyles are based on what seems like their irl/interview-hair (aka practical hairstyle, because as unnaturally elven as they are they sadly do not have magical hair) (x). Elto's pink arrow fletchings and Kitto's blue mesh cape refer to the pink/blue matching outfit (x), while Elto's bow/quiver harness and both of their shirt colors reference the harness outfit.

Their weapons follow the opposite color scheme as their armor for contrast purposes, and weapon types (double rapiers + bow, double daggers) are based on braywashed's post here.

Both of PD's armor designs draw influence from c. 15th century English armor, seeing as they are British people, and feature a unique half-breastplate evocative of the extremely cropped sleeve shirt things they normally wear when wrestling.