Full art:

Back:

Right: “Primera’s spear”
Left: “Sticking [the spear] in the keyhole in its back activates Emeth VI”

Side view:

Left: “Side-view of the cockpit”
Right: “Primera’s mana”

Note: These two notes were included in the reference art for the pilots.

Spear:

Top: “When it’s turned off”
Bottom: “Assault spear created by mana”

Shoulders:

“When it’s turned off, the pink light disappears”

Wing horns:

Spear/key:

Left: “Attached by magic”
Right: “Spear <-> Key”

Shield:

“The shield seems much bigger because of the effect of the magical circle”

Expressions:

From left to right: “Tense”, “Smiling”, “Defeated”

Trudea:

“Trudea -> becomes an energy source!”

Source.