Lydia didn't really need a face change, especially if you had a face texture mod. but lydia mods seem to be quite popular so here is my take on everyone's fave housecarl. i only changed appearance, appropriate gender animation and -20 weight (vanilla is 100).

If you like this, please endorse and check out some of my other NPC face change


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VERSION
Lydia-1_1 fixes neck seam by resetting weight
Lydia-1_1-voice also neck fixed
Lydia-1 is default file
Lydia-1-withvoice is default file with voice change from FemaleEventoned to FemaleYoungEager. -requested by Gerogio54

Only download one of these versions, I will update both at the same time
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INSTALL
Drop .bsa and .esp into Data folder
-Put at bottom of load list
-Will conflict with mods that also change Lydia's face

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Required mods
ApachiiSkyHair
http://skyrim.nexusmods.com/downloads/file.php?id=10168

Recommended mods

You will need these also to replicate my uploaded image:

Coverwomen by MrLenski (any)
http://skyrim.nexusmods.com/downloads/file.php?id=3563
Covereyes by MrLenski (any)
http://skyrim.nexusmods.com/downloads/file.php?id=4869
DIMONIZED UNP female body
http://skyrim.nexusmods.com/downloads/file.php?id=6709
TWO CASUAL WEARS by Hentai
http://skyrim.nexusmods.com/downloads/file.php?id=12957
Barrel Outfit (Lols galore)
http://skyrim.nexusmods.com/downloads/file.php?id=11768

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Creds to above for their awesome textures and meshes