Lazuli Heitz is the daughter of Opal Koboi and Briar Cudgeon.
She's a pixel, an elf/pixie hybrid and Opal Koboi and Briar Cudgeon had sort of a relationship in The Arctic Incident even if Cudgeon was planning to betray her.http://tvtropes.org/pmwiki/pmwiki.php/WMG/TheFowlTwins
FollowingWMG / The Fowl Twins
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