Palatalization is when the flat of the tongue gets close to the roof of the mouth (palate). Since the い sound is pronounced more clearly in Kansai-ben than it is in standard Japanese, it affects the consonant right before い (causing palatalization). Below are some examples of palatalization in Kansai-ben, with their standard counterparts for comparison.

SoundWordStandardKansai-ben
し四
(し)
し

[↓]

しぃ

[↓]

ち血
(ち)
ち

[↓]

ちぃ

[↓]

に何
(なに)
なに

[↓]

なにぃ

[↓]

み紙
(かみ)
かみ

[↓]

かみぃ

[↓]