I'm not a native English speaker. The following sentences was written by machine translation.

Please refer to "FAQ" (scroll below) if you need some help.
It covers the answer for frequently asked question.

!! Requirements !!
Relationship Dialogue Overhaul - RDO or FollowerVoiceTypesPlus
Marriageable Voicetype Plus  (If you want to marry to him)

[Recommended]
Follower Management Mod
Face Light

Also I think you can make him follower by using function of AFT, FLP, etc.
In this case, however, his dialogues with voice will be less.
Therefore, I highly recommend using MFVM (English voice) or FollowerVoiceTypesPlus (Japanese Voice).

[Permission]
- Do not post this mod the somewhere else without permission.
- Do not reupload this mod and claim them as your own.
- Do not use his face data or head mesh (including preset file) for your mods.
- Do not use this mod as resources warehouse.

[Profile]
Name: Estrion
Race: Altmer
Level: 10-99, Autoleveled
MainSkills: One-handed Restoration, Destruction, Sneak, Alchemy
Spells: Firebolt, FlameCloak, WardSteadfast, Healing Breeze*1
Perks: AugmentedFlames, Destruction Dual Casting, LightFoot, SnakeBlood, GreenThumb, High Concentration*2, Viper Poison*2
Protected: yes
Marriageable : yes*3
Voice type: MaleElfHaughty
Location: Frostfruit Inn (Rorikstead). However, He is out to field research during 13:00-18:00.
Notes: He is member of the College of Winterhold.
He has interest in Rolikstead that visited during travel, immersing himself in study.

*1 Unique spell.
  Healing Health and Stamina everyone close to the caster 50 points.
  (NPC doesn't usually use Grand Healing, but this is customized in order also to use NPC.
   The effective area is wider than Grand Healing, and enemy isn't recovered. Thanks to okame28.)

*2 Unique Ability.
 High Concentration: It increase restore amount of restoration spells in response to the value of Restoration skill.
 Viper Poison: Attack with dagger give slip damage of poison. (with a 15% probability, and during 10s)

*3 Required Marriageable Voicetype Plus because his voice-type is not suited for marriage at vanilla.

[FAQ]
Q. I could not find him. Where is he?
A. He is out to field research during 13:00-18:00.
If you want to meet him certainly, you should wait for his come back.

  Please try the following in turn if does not solve the problem:
   - Please save the game and reload it.
   - Please enable esp file correctly, and check load order.
   - If you do not solve the problem even if try the method described above, please re-install this mod.

Q. He makes crash my game :(
A. This mod has simple structure. It is quite unlikely that causing crash and fatal conflict.

Q. He hasn't dialogue for talking. / He can't be made follower.
A. Please save the game and reload it.

Q. I can not engagement with him. He seems that does not see Amulet of Mara.
A. You need installing Marriageable Voicetype Plus, and progress marriage quests.

Q. Marriage with him is not working well.
A. This trouble is quite common. The reason why is that the marriage system of vanilla has many bugs. Please google it for details.
    (This mod never editing records and scripts about the marriage system so I'm sure that the cause does not lies in this mod.)

    A common way to solve:
   - You can prevent that by installing Unofficial Patches or Marriage Mod - To Have And To Hold.
     As stated previously, I highly recommend installing it in advance if you planned marriage with him.
   - Please save game before marriage or engage, and when problem occurred, redo from there.

Q. He doesn't wear gear I gave...
A. Probably, He will not equip gears that has lower defense than his starting gear. This is by design of vanilla.
    Some follower management mod (e.g. AFT) has the function that remove starting gear from follower.
    Let's check it out on the Internet.

Q. I want to change his body type (or underwear).
A. Since I have no plan to add variation, please try yourself.
    It is necessary to replace the files manually.
      His meshes of body: meshes \ actors \ character \ Estrion\
      His textures of body: textures \ actors \ character \ Estrion\
    Please search for instructions.

Q. Have you plan release his preset data?
A. No.

Q. Have you plan release Non-Standalone version?
A. No.

Q. Have you plan release for Xbox/PS4?
A. No.

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[Credits]
Bethesda
ApachiiSkyHair by Apachii
Better males - Beautiful nudes and faces - New hairstyles by Chris57 and FavoredSoul
Enhanced Character Edit by ECE team
Eyebrow Specularity Fix by Sooner266
Eyes Glitch Fix by bellwood2206
Eyes Shadow FIx by Elza
Fair Skin Complexion by HHaleyy
Hale - Iridum Eyes by Halendia
High Res Male Face Makeup for SKSE by Diethardt
Improved Eye Reflections and Cube Map by fadingsignal
KS Hairdos - Renewal by Kalilies Stealthic Khaos and Shocky
Real Girls Realistic Body Texture for UNP UNPB and SeveNBase by Zonzai and Seren4XX
SG Female Eyebrows by Hello Santa
Pretty Face for men by tktk (normalmap, subsarface)
Smooth Male Body - textures for Better Males - SOS Schlongs of Skyrim by urshi
The Neith Team Warpaints Set by ElaNeith 
XP32 Maximum Skeleton Extended - XPMSE by Groovtama

- Use on Screenshots
Mfg Console by kapaer
Screenshot Assist by saLa
GomaPero Poses by Gomaperopero
Halo's  Poser by Halofarm
Kinoko Pose by cryptoporus
Apachii Divine Elegance Store by Apachii
Mage Outfit Texture Overhaul (HD 2K) - MOTO - With Schools of Magic by Rafuel and Alexandriel 
Seasons of Skyrim ENB True HDR by Bronze316
Serenity ENB _ ExtendedFX by prod80
True Vision ENB by Bronze316

- Special Thanks
okame28
UNI

I appreciate these wonderful works!