[Sin]

Sinistress: Probably one of her most key features is the metal spikes which serve as heels on whatever shoes she is wearing.

Upon entering the House of Quirks, she finds that her heels have become grossly disproportionate to the rest of her, and to her mind she is raised up on metal spike stilts.

Resulting effect: She's not moving very quickly through this house for fear that she'll fall over.

Other characters may choose to see her heels as she does, (stilts) and marvel at her balancing capabilities, or they may see them as the regular 4 inch spikes they are, and wonder why she would be so silly to wear them if she doesn't know how to walk in them yet.

[Lady Shimmer]

Eyes...

Having Sunshine Yellow eyes, the "Sunshine" part of them will become grossly disproportionate upon entry to the House of Quirks.

Eyes will "burn" and to Shimmer's perception stuff she looks upon will also start to smoulder.

[VoodooPriestess]

The vital part of Aurora's character which is her link between her and several hundred mortals from various places around the world is what gets grossly exaggerated when she tries to enter the house.

She feels everything they do both physically and emotionally on top of what her own physical senses pick up.

[Tetranity]

Just so you all know, my characters name is Jove.
I didn't decide on which of my characters I wanted to play 'til after I chose my username.

Anyways, on to the relevancy.
Jove is a ghost, and it seems that the House has an opposite effect on her ghostly 'powers'. She is unable to float, pass through solid things or dissappear.

Her lingering humanity is what will become emphasized in the House, but only inside of her head. She will see herself as she was when she was alive: a girl of nineteen, alive and vibrant, with her dress restored to its' original brilliant white silk splendor. She will once again hear her hearbeat and feel a pulse, and when she looks in the mirror, she will see a flush in her cheeks.

Unfortunately, the others cannot see this. What they see is a ragged, pale, oblivious ghost with mussed up hair and a greyed, ancient torn dress. This ought to cause a bit of confusion.