Name: Rainer Robertson

Age: 6 (Currently) 18 (Future)

Height: 6'7 (When Hits 18)

Species: 1/2 Grimm 1/2 Demon

Personality: Fearless, Cocky, Nonchalant, Badass, Rebellious, Anti-Governmental, Calm Most Of The Time.

Looks

Casual Wear/ Battle Attire

Weapons

Engine Blade

Red Hood's Weapons (Couldn't Find Name)

Throwing Knives/ Combats Knives

Powers- Semblance- Matter Absorption- Rainer can absorb matter alive or not to gain increased physical abilities such as increasing his strength, speed, durability and endurance but for living things, he will gain a person's semblance but not their weaknesses.
1: Supernatural Strength.
2: Supernatural Speed.
3: Supernatural Durability.
4: Supernatural Endurance.
5: Nigh Limitless Stamina.
6: Immortality.
7: Sunlight Immunity.
8: Blood Demon Arts.
9: Grimm Creation.
10: Matter-Based Attacks.
11: Menacing Presence.
12: Mind Reading.
13: Telekinesis.
14: Telepathy.
15: Wide Array of Stolen Semblances.
16: Power Stealing Negation.
17: Control Over Lesser Demons.
18: Demon Power Nullification.
19: Kibutsuji's Curse.
20: Supernatural Senses. 
21: Biology Manipulation.
22: Nigh-Absolute Regeneration.
23: Immense Magic Power.

Some Extra Harem Members

Mirko 

Nejire Hado

Velvet Scarlatina and Coco Adel

Makima