What pronoun do Catholics typically use to refer to the Eucharist? Catholics believe that the communion bread and wine are not bread and wine anymore but the Lord Jesus Christ himself appearing as bread and wine.

Since in Catholic dogma the communion bread and wine becomes Jesus Christ, who is himself a person, that raises the question about what pronoun is used to describe the Eucharist. This change of substance (Transubstantiation) does not include the change in form, though. 

What pronoun do Catholics typically use to refer to the Eucharist? Do they use the pronoun "He"?
I have never heard [of] a pronoun used for the Eucharist.

This section II. WHAT IS THIS SACRAMENT CALLED? in the Catechism of the Catholic Church lists the different names given to the Eucharist:

1) Eucharist, because it is an action of thanksgiving to God.

2) The Lord's Supper.

3) The Breaking of Bread.

4) The memorial of the Lord's Passion and Resurrection.

5) The Holy Sacrifice.

6) Most Blessed Sacrament.

7) Holy Communion.

8) The holy things (ta hagia; sancta).

9) The bread of angels, bread from heaven, medicine of immortality, viaticum ...



Expressions

He (the LORD) is truly present in the Blessed Sacrament of the Altar

or

He is truly present under the appearances of bread and wine

Cf. Eucharist Hymn: Adoro Te Devote by St. Thomas Aquinas (1225-1274):


  Hidden God, devoutly I adore Thee,
  Truly present underneath these veils:
  All my heart subdues itself before Thee,
  Since it all before Thee faints and fails.
  
  [...]